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Hello,Share Market: In simple terms, just like any other real market, Share markets too involve buyers and sellers, who deal in shares. these may include shares or securities listed on an exchange as well as those only traded privately. The stock market can be split into two main sections: the primary market and the secondary market. The primary market is where new issues are first sold through initial public offerings. Institutional investors typically purchase most of these shares from investment banks. All subsequent trading goes on in the secondary market where participants include both institutional and individual investors.SENSEX: Its full form is Sensitive index. It is the benchmark index that represents the Bombay Stock Exchange. It is composed of 30 of the largest and most actively-traded stocks on the BSE. The index is calculated based on a free-float capitalization method when weighting the effect of a company on the index. It means that it uses the shares readily available to trade, to measure its effect on the index.Nifty 50: Its made up of 50 companies. It is the the benchmark index for the National Stock Exchange. Hence got the name Nifty. Companies here are usually characterized by consistent earnings growth and high P/E ratios.I hope it helped. Godspeed.

112 Squadron RAF Kittyhawk IA (P-40E) in Egypt, 1942.UPDATED: British and Commonwealth forces operated most US designed and built fighters available during the Second World War. Indeed of the main types used by the USAAF and USN, only the P-38 Lightning and P-61 Black Widow were not adopted by the British Commonwealth in some capacity.Commonwealth forces almost certainly preferred the P-51 Mustang, closely followed by the F4U Corsair and F4F Hellcat, over all other types, although the P-40 Tomahawk and Kittyhawk shouldered a larger burden for longer and at a much more critical period as one of the RAF’s main fighters in North Africa, Sicily and Italy and the principle Commonwealth fighter in the Pacific theatre.British and Commonwealth use of US built fighters from 1940–45 is a long story that began with a joint British-French purchasing commission sent to the USA in October 1939, just after the war began. Before the lend-lease agreement was in place, buying equipment from the then neutral USA was seen as a short-cut to help rapidly build up the RAF and Armee de l’Air.6 squadron SAAF Mohawk IVs (ex-French Hawk 75-As), Durban, South Africa, April 1942In 1939 there were only two useful fighters in production in America - the USAAC’s Curtis P-36 Hawk and the USN’s Brewster F2A Buffalo. France ordered lots of P-36s to make up shortfalls in quality and domestic production of its principle single-seater, the Morane Saulnier 406, and delays in fielding the much better Dewotine 520, while Britain ordered F2As (B-339Es) for service in Asia (Singapore, Malaya and Burma).Both Britain and France ordered other promising designs not yet in production - Bell P-39 Airacobras, Curtis P-40 Warhawks, Grumman F4F Wildcats and Douglas DB-7 Havocs - off the drawing board, so to speak.5 squadron RAF Mohawk IVs over Assam, India, 1943.A number of French ordered Hawk 75-As (export version of the Curtis P-36) reverted to the RAF after the fall of France. Most were sent to South Africa, where they were used as operational trainers to transition pilots to P-40s, although some were used by the SAAF to provide air defence over Capetown and Durban after the Japanese attack in 1942–43.A licence production agreement had been made with Hindustan Aeronautics in India to produce the Mohawk (as the P-36 was called by the RAF) for Nationalist China, although only 8 were produced before the Japanese attack, after which production was terminated to enable Hindustan to focus on RAF and RIAF aircraft repair work. In early 1942 these few airframes were commandeered by the RAF and formed the only air defence squadron in India!The remaining ex-French Mohawk airframes held in storage in Britain were hurriedly sent to Calcutta in 1942, and along with the few locally produced models served with three squadrons in the fighter and army cooperation role (artillery spotting, ground attack and tactical reconnaissance) in quieter northern Burma sectors from mid ’42 to early ‘43.601 Squadron RAF Bell P-400s (Airacobra Is), England September 1941.By the time the Anglo-French P-39, P-40 and F4F procurement was ready for delivery France had fallen, and Britain took over the orders. It was quickly determined that the P-400 export variant of the P-39 was not going to live up to its promise of a 400 mph fighter, and only one Squadron (601 Sqn.) was equipped with the type, and they transitioned back to Spitfires after only 6 months.In the event the bulk of the P-400 order was sent via Arctic convoys to the Soviet Union as lend lease (where they were much liked and better suited to the low level air combat conditions typical of the Eastern Front), or taken up by the USAAC for use in the Pacific theatre (most of the ex-RAF order P-400s went to New Guinea) in the months immediately after Pearl Harbor.112 Squadron RAF P-40C (Tomahawk IIb), Libya, summer 1941.The P-40B/C was also judged not suitable for use in NW Europe, due to its poor performance at altitude and sluggish rate of climb (most air combat over Britain and France took place over 20,000 feet).A few Northern Ireland-based RAF and RCAF squadrons were briefly equipped with Tomahawks (as the British called the P40B/C) in the low-level tactical reconnaissance role in 1941, but the vast majority were sent to North Africa.In Egypt, Libya and Tunisia (and later Sicily and Italy) they served with RAF, SAAF and RAAF squadrons in the RAF’s 1st Tactical Air Force (the Desert Air Force) where they proved successful and were admired for their range and rugged construction.The air war in the desert took place over vast distances in a tactical close air support context and played to the P-40s key strengths - long range, ability to take punishment, competitive low-level performance and the ability to carry a range of air-to-ground ordnance.3 squadron RAAF Merlin-powered Kittyhawk IIAs (P-40Ls), Desert Air Force, Italy, 1943.While not a match for the Luftwaffe’s Bf 109s at altitude, Kittyhawks could hold their own with Bf 109s at low level and outperform most Italian types. From mid 1942 onwards P-40s were supplanted by Spitfire Vs and VIIIs in the air superiority role and were re-roled to replace Hurricane IICs, Ds and Es as the principle RAF tactical fighter-bomber in the Mediterranean theatre, where their pilots and ground crews nicknamed them Kittybombers.40 squadron South African Air Force P-40N (Kittyhawk IV) fighter-bomber, Italy 1944.It was 112 Squadron in Egypt that first painted the iconic ‘shark mouth’ nose-art on their Tomahawks in early 1941, a design copied and made famous by Claire Chennault’s American Volunteer Group (the Flying Tigers) in Burma and China later that year. 112 kept their sharkmouth on P-40s and P-51s throughout the war, indeed until they were disbanded in 1957 they wore it on their CF-86s (Sabre F4s) and Hawker Hunter F6s too.A 15 squadron RNZAF P-40E (Kittyhawk IA), October 1942. P-40s were used by both the RAAF and RNZAF in the Southwest Pacific from 1942–44, after which they were replaced by F4U Corsairs (RNZAF) and P-51D Mustangs (RAAF). The cadre of experienced pilots for 15 squadron was made up of F2A Buffalo pilots who had escaped from Singapore to New Zealand, via Indonesia and Australia. Two RCAF squadrons also took the P-40E to war against the Japanese in the Aleutians in 1942–3.P-40s were the mainstay tactical fighter-bomber of the RAF in North Africa and the Mediterranean theatre from 1942–44, after which they were replaced by Merlin-powered P-51s (Mustang IIIs and IVs) and bomb-carrying Spitfire XVIs.3 Squadron RAAF, attached to the Desert Air Force in North Africa and Italy, was the only Commonwealth squadron to operate the Packard Merlin powered Kittyhawk II and IIA (P-40Fs and Ls). These were the most common variants operated by the USAAF in the Mediterranean from 1942–43. 3 Sqn RAAF converted to P-51s in Italy towards the end of the war.RAAF, RNZAF and RCAF squadrons operated Kittyhawks in the Pacific theatre from 1942, with RAAF squadrons converting to Mustang IVs (P-51Ds) and RNZAF squadrons converting to Corsair IIs (F4U-Ds) late in the war. The RAAF even used a few Republic P-43 Lancers as reconnaissance platforms in 1942–3.The Vultee P-66 Vanguard was a low-cost monoplane fighter of moderate performance developed for export in the late 1930s. The RAF took over some of the Swedish order for use as advanced trainers. In the event most were sent to Nationalist China as lend-lease.In 1941 Britain also took delivery of 100 Vultee P-66 Vanguard fighters, intending to use them as advanced trainers in Canada. The type had been developed for export to Sweden pre-war, but the order was embargoed by the US Government after Pearl Harbor. After evaluation the RAF decided not to use the P-66 trainers, and the RAF airframes and the rest of the Swedish order (which went to the USAAC) were eventually sent to China as lend-lease.Martlet IIs (P&W Twin Wasp powered F4F-3s) from HMS Indomitable over the Indian Ocean, 1942. The Royal Navy dropped the British name ‘Martlet’ in 1943 and adopted the US name ‘Wildcat’. Wildcats served aboard British escort carriers through to the end of the war in every theatre.Royal Navy aviation had been controlled by the RAF up to 1939, and had been starved of funding as a consequence. The absence of good British naval fighters meant that the Fleet Air Arm used US designs extensively from 1942 onwards.The first early-model F4F Wildcat (called the Martlet I in FAA parlance) squadron was formed by the Royal Navy in 1940 with ex-French ordered machines, and fought during the Battle of Britain, providing fighter cover over the Home Fleet’s base at Scapa Flow in Orkney.Another squadron was formed in the Mediterranean in 1941 with early production machines originally ordered by the Greek air force (called Martlet III and IIIAs - these were USN F4F-3As - the IIIA were without folding wings), which were used as land-based fighters to protect the Royal Navy’s base at Alexandria, Egypt.Grumman Martlet Is (ex-French ordered Wright Cyclone powered F4F-3s) of 804 Naval Air Squadron, Fleet Air Arm, patrolling over the RN base at Scapa Flow in October 1940. On Christmas Day 1940, two of 804’s F4F-3s shot down a Junkers Ju 88 - the first recorded Wildcat kill. The F4F-3 has the distinction of being the only US-built single seat fighter to participate in the Battle of Britain.805 Naval Air Squadron Martlet IIIs (ex-Greek ordered F4F-3As, identical to the USN variant: the Martlet IIIA was the same variant, minus the wing folding mechanism), Alexandria, Egypt, April 1942British purchased Pratt and Witney Twin Wasp powered Martlets (Marlet IIs) began to arrive in late 1941 too. Unlike the USN version they had self sealing tanks, reflector gunsights and cockpit armour. They were used aboard the fleet carriers HMS Indomitable and HMS Formidable in the Indian Ocean and HMS Victorious and HMS Illustrious in the Mediterranean and Pacific (Victorious operated with USS Saratoga as part of the US Pacific Fleet for six months in 1943 carrying both FAA and USN Wildcats). Martlet IIs were used on the first escort carrier too, HMS Audacity. Eric “Winkle” Brown, the famous post-war test pilot shot down two Fw Condor patrol aircraft in his Martlet II from Audacity.RN Wildcat IV (lend lease supplied F4F-4s) with invasion stripes, July 1944. The Wildcat IV was the standard fighter carried aboard RN escort carriers at the time.By 1943 the Wildcat IV (F4F-4) had become the standard Royal Navy and Royal Canadian Navy fighter on 35 Royal Navy escort carriers, and were very well regarded by Fleet Air Arm pilots both as defensive fighters and for use in attacks on surfaced submarines in the Atlantic (armed with 60lb air-to-surface rockets).21 (City of Melbourne) Squadron RAAF Buffalo Is, Singapore, December 1941 . The hastily assembled RAF purchased Buffalo Mk1s were flown by mostly New Zealand and Australian reservists and trainee pilots with no prior experience of monoplane fighters, obsolete tactical training and very little conversion time on the type. They were outclassed by Japanese Zeros and Oscars in late 1941 and early 1942 over Malaya and Burma, although the surviving pilots went on to fly better US types such as P-40s, P-51s and F4U Corsairs successfully over the Southwest Pacific for the RAAF and RNZAF.Twelve 243 Squadron RAF Buffalo Mk1s escorting Bristol Blenheim IV light bombers over Malaya during the Japanese invasion, December 1941.The RAF, Finnish, Belgian and Dutch East Indies air forces also ordered F2A Buffalos in 1939. The British ordered B-339Es were not effective, partially due to the model selected being under-powered (200hp less powerful than the standard USN F2A-2 and those supplied to the Dutch East Indies, Belgium and Finland) and overweight (the British added self-sealing tanks, cockpit armour, armoured glass and reflector sights), and partially due the lack of experienced fighter pilots in the theatre.A rare shot of an 805 Naval Air Squadron F2A Buffalo II operating from the fleet carrier HMS Eagle in the Mediterranean in 1941.805 Naval Air Squadron also operated Buffalos (more powerful ex-Belgian B-339Bs). These were originally ordered by the Belgian Air Force and diverted to Canada and Britain after the German occupation. They served in Egypt from late 1940 (before replacement with Martlet IIIs in September 1941). A flight of 805 squadron Buffalos were used from September 1940 to replace Sea Gladiators providing air defence for the Mediterranean fleet from the old light carrier HMS Eagle.An RAF Allison-powered Mustang I (similar to the P-51A) over southern England in 1942. They were issued to several RAF and RCAF tac recce wings in Britain.The North American P-51 Mustang was the outcome of the by now all British purchasing commission providing a specification to North American to develop a fighter that addressed the weaknesses of the P-40 in NW Europe (they had originally asked North American to licence produce P-40s, but NA made a counter-proposal to rapidly develop a new type better-suited to European conditions). Even the early Allison engined P-51 models were much appreciated by the RAF, although they lacked useful performance at altitude.The rocket and bomb armed P-51B/C and D/K (Mustang III and IV) replaced P-40Ns in the ground attack role with the RAF and SAAF Desert Air Force fighter-bomber squadrons in Italy from mid-1944.The UK directly purchased Mustang Is and IAs and received P-51As under lend-lease (called Mustang IIs by the RAF). These Allison powered Mustangs were used, like P-40C Tomahawks before them, for low level tactical reconnaissance missions in NW Europe, and served with distinction in that role from 1942–44. At low level an early Mustang could outperform a Bf 109G or Fw 190A (one of the few bright spots of the disastrous Dieppe Raid in 1942 was the stellar performance of the RAF Mustangs against FW-190s at low-level over the beaches).The Allison -powered Mustang IA had 4x20mm cannon and was used by RAF Fighter Command for low level tactical reconnaissance over France. The oblique camera mounting can be seen clearly behind the cockpit.The cannon armed British-purchased tactical recce models (Mustang IA - a P-51A variant armed with 4x20mm Hispano cannon) had a particularly good record against both Luftwaffe types, so much so that RAF squadrons worked hard to keep them in service long after production had shifted to the Merlin 60 powered P-51C/D, as they preferred the Allison-powered Mustangs to the Spitfire FRIXs that replaced them in the low-level tac recce role.112 Squadron RAF (again!) Mustang IVA (P-51K), Italy 1945. From 1944 onward, 112 Squadron turned in its Kittyhawk IVs (P-40Ns) for Merlin-engined Mustangs in Italy. P-51s were the RAF’s primary tactical fighter-bomber in Italy, Greece and the Balkans in 1944–45.Not all Commonwealth P-51s wore camouflage. These are 3 squadron RAAF Mustang IVs (P-51Ds) over Italy, 1945.Whilst the majority of early production Packard Merlin-engined P-51Bs and Cs went to the USAAF’s 8th Air Force (which needed them most as long range fighter escorts), those that the RAF received under lend lease were also very much liked, and were used to form a few long range escort wings in the UK (Polish and Canadian squadrons got most of them).The British also developed the Malcolm hood (a Spitfire-like blown canopy - to improve visibility) and used Packard Merlin engined P-51B/Cs, Ds and Ks (Mustang III and IVs) to reequip the remaining RAF and SAAF P-40N Kittyhawk IV fighter-bomber squadrons in Italy in late 1944.Packard Merlin powered Mustang IIIs (P-51Cs) of 315 squadron RAF, a Polish fighter squadron, in eastern England, December 1943. Mustangs provided long range escort for daylight precision raids by Mosquitos and Lancasters on Gestapo HQs in Denmark and France, the V1 and V2 launch sites in Germany and Holland and the Tirpitz and other warships holed up in Norwegian Fjords. The P-51Bs and Cs were replaced by P-51Ds and Ks in late 1944.19 Squadron RAF P-51Cs (Mustang IIIs) over southern England, April 1944. 19 squadron escorted Mosquito interdiction raids and performed close air support missions during the Normandy landings.Merlin-engined RAF and RCAF Mustang IIIs and IVs were used like their USAAF counterparts as long range escorts, but mostly at lower altitudes. Lancaster daylight precision raids with Barnes Wallis designed Tallboy and Grand Slam 10,000 lb and 20,000 lb ‘earthquake’ bombs on critical infrastructure, the Peenemunde rocket research facilities and V1 and V2 sites were escorted by Mustangs, as were Mosquito low-level precision raids and anti-shipping strikes.Another 19 squadron Mustang, this time a P-51D (Mustang IV) photographed from a Mosquito FBVI over the North Sea in late 1944. Operating from Peterhead in Scotland, 19 squadron provided long range escort for anti-shipping strikes by the Banff Wing’s Mosquitoes in Norwegian waters.Royal Canadian Navy Corsair II (F4U-D), British Pacific Fleet, Okinawa 1945. On 9 August 1945, days before the end of the war, Corsairs from HMS Formidable attacked Shiogama harbour on the northeast coast of Japan. RCN pilot, Lieutenant Robert Hampton Gray, of 1841 Squadron was hit by flak but pressed home his attack on a Japanese destroyer, sinking it with a 1,000 lb (450 kg) bomb but crashing into the sea. He was posthumously awarded Canada's last VC, becoming the second fighter pilot of the war to earn a Victoria Cross as well as the final Canadian casualty of World War II.The Royal Navy was the first to take the F4U Corsair to sea on an aircraft carrier in 1943, and loved their early model Corsairs. The Royal Navy cleared the F4U for carrier operations well before the U.S. Navy. In Royal Navy service, because of the limited hanger deck height in several classes of British carrier, many Corsairs had their outer wings "clipped" by 8 in. This also reduced the F4U's propensity to "float" in the final stages of landing. Despite the clipped wings and the shorter decks of British carriers, Royal Navy pilots found landing accidents less of a problem than they had been in the U.S. Navy, thanks to the curved approach they used. British units solved the landing visibility problem by approaching the carrier in a medium left-hand turn, which allowed the pilot to keep the carrier's deck in view. This technique was later adopted by U.S. Navy and Marine fliers for carrier use of the Corsair.Royal Navy FG-1Ds (Corsair IVs), aboard the light carrier HMS Vengeance in late 1945.The Royal Navy developed a number of modifications to the Corsair that made carrier landings more practical. Among these are a bulged canopy (similar to the Malcolm Hood), and raising the pilot's seat and wiring shut the cowl flaps across the top of the engine compartment, diverting oil and hydraulic fluid spray around the sides of the fuselage.Corsair Is (F-4U-1 and 1A) were used to escort Operation Tungsten, a carrier strike on the Tirpitz in April 1944. Although the battleship survived 15 bomb hits and two waterline holings, she was severely damaged and unable to intervene during the Normandy invasion.Corsairs were used to escort carrier strikes on the Tirpitz and other shipping in Norway and to provide fighter cover during the Battle of North Cape in 1943 (where the German battlecruiser Scharnhorst was sunk).Royal Navy Corsair Is (F-4U-1A) launching from a carrier in the North Atlantic in late 1943.Both Corsairs and Hellcats were used from 1943–45 as fleet fighters in the Atlantic, Arctic and Pacific with great success.1840 Naval Air Squadron Hellcat Is (F6F-3) over England in June 1944Short-ranged British Seafires (navalised Spitfires) were used to provide Combat Air Patrols over the fleet, while the US built fighters were used offensively as escorts and attack aircraft. The British Pacific Fleet conducted extensive operations against Japanese targets in Malaya, Indonesia, Okinawa and over Japan in 1944–45 using these types.Royal Navy Hellcat II (F6F-5), with the British Pacific Fleet off Okinawa, 1945. Hellcats and Corsairs were the primary offensive fighters of the Royal Navy fleet carrier force in 1944–45, Seafires were used defensively to provide fighter cover over the fleet.1839 Naval Air Squadron FAA Hellcat MkIIs (F6F–5) on HMS Indomitable, Pacific Fleet, 1945. 1844 Squadron, also aboard Indomitable, was the Pacific Fleet’s highest scoring unit over Okinawa and Japan in 1945, with 32.5 kills.While Republic P-47 Thunderbolts were not immediately used by the RAF when they became available in 1943, from late 1944 it was decided to transfer a large number of ex-US 8th and 9th Air Force P-47D Thunderbolts to the RAF and RIAF in India. These were to replace a mix of Hurricane IIC/Ds and IVs and Vultee Vengeance dive bombers then being used in the tactical fighter-bomber and close support role by the 3rd Tactical Air Force in India and Burma.“Razorback” P-47D Thunderbolt Is on the flightline, Chittagong India, December 1944From October 1944, thousands of these tired former USAAF P-47s (many of them the early ‘razorback’ models) were shipped from the UK to RAF maintenance depots in Egypt, where they were tropicalised and refurbished and sent on to India.From December 1944 they became the mainstay of the 3rd Tactical Air Force’s fighter-bomber wings attacking Japanese forces during the drive to Rangoon, and were a distinct improvement on the old Hurricanes, which were themselves hand-me-downs from the RAF in Egypt.Some of these P-47s went on to serve with the Armee de L’air against the Viet Minh in Indochina post-war.A 30 squadron RAF Thunderbolt II (P-47D) sorties from Cox’s Bazaar, India, early 1945. P-47s were the RAF’s primary tactical fighter-bomber in Southeast Asia from late 1944 to the end of the war. They were mostly surplus USAAF 8th and 9th Air Force machines, shipped from England to India via Egypt under lend-lease.Early in the war the RAF also converted a large number of Douglas DB-7 attack bombers (originally ordered by France) to Havoc I night fighters for service during the winter of 1940–41. These had extra fuel tanks in the bomb-bay and 8 .303 Browning machine guns in a solid nose. The mid-upper defensive gun position was glazed over and replaced by an AI Mk1 air interception radar and operator, with antenna mounted on the nose and under the wings.The radar, long endurance and good overall performance of the Havoc enabled the type to successfully fill the night-fighter role until purpose designed Beaufighter and Mosquito night fighters became available in sufficient numbers from 1942. The Havocs, alongside early model Beaufighters and similarly modified Bolton Paul Defiants, contributed much to blunting the German blitz on London and other cities.RAF Havoc I (a heavily modified ex-French order DB-7 with an 8 x .303 machine gun solid nose, extra fuel tanks and early British AI radar), winter 1940–41.In summary, the Mustang, Hellcat and Corsair provided British and Commonwealth Air Forces and Navies with capabilities they could not supply from domestic industry, and were indispensable to the RAF, SAAF, RAAF, RNZAF, RCAF and RN and RCN Fleet Air Arms.Without access to US-supplied fighters, and especially the P-40, the RAF and Commonwealth Air Forces would not have been able to rapidly scale up offensive tactical air forces simultaneously in three theatres from 1941, and by 1944 P-40s, P-47s and P-51s formed the mainstay of the fighter-bomber squadrons of the 1st and 3rd Tactical Air Forces in the Mediterranean and Far East and of Commonwealth fighter forces in the Pacific.In Northwest Europe P-51 Mustangs allowed RAF Fighter Command and the RAF 2nd Tactical Air Force to roam deep into Nazi occupied Europe from 1942 onwards, initially to conduct tactical reconnaissance missions and later to provide escort for Mosquito and Lancaster bombers on daylight precision bombing raids and anti-shipping strikes.US-built fighters were even more important for the Royal Navy and Royal Canadian Navy, and without them it is doubtful that the British carrier force could have reached its full potential and contributed so ably to the defeat of the German submarine and German and Italian surface threat and Japanese forces in the Indian Ocean and Pacific.441 squadron RCAF Mustang III (P-51C) of RAF Fighter Command, eastern England, 1944.Technical information on the RAF variants of US WW2 fighters can be found on the wiki entires for each type, or alternatively you can ask me about them in a comment. More details on RAF P-51 variants can be accessed here https://erenow.net/ww/mustang-thoroughbred-stallion-of-the-air/8.php

Stock Market refers to the collection of markets and exchanges where the issuing and trading of equities (stocks of publicly held companies), bonds and other sorts of securities takes place, either through formal exchanges or over-the-counter markets. Also known as the equity market, the stock market is one of the most vital components of a free-market economy, as it provides companies with access to capital in exchange for giving investors a slice of ownership.How Does the Stock Market Work?The stock market can be split into two main sections: the primary market and the secondary market. The primary market is where new issues are first sold through initial public offerings (IPOs). Institutional investors typically purchase most of these shares from investment banks; the worth of the company "going public" and the amount of shares being issued determine the opening stock price of the IPO. All subsequent trading goes on in the secondary market, where participants include both institutional and individual investors. (A company uses money raised from its IPO to grow, but once its stock starts trading, it does not receive funds from the buying and selling of its shares).Sensex, known as the S&P BSE Sensex index, is the benchmark index of the Bombay Stock Exchange (BSE). It is composed of 30 of the largest and most actively-traded stocks on the BSE, providing an accurate gauge of India's economy. Initially compiled in 1986, the Sensex is the oldest stock index in India.