Indian Energy Exchange (IEX) is the first and largest power exchange in India with a dominant market share of 92%, according to its financial year (FY) 2021 investor presentation. IEX is India’s premier energy exchange providing a nationwide, automated trading platform for physical delivery of electricity, renewable power, renewable energy certificates and energy saving certificates.IEX is one stock that most investors want to own in their portfolio due to its monopoly business with almost 95% market share, strong growth outlook with long-term contracts, said Santosh Meena, head of research at Swastika Investmart. Shares of the company have surged 190% in 2021 so far. The company’s financial performance has also remained strong and in line with analysts' expectations in the June quarter. Net profit grew by 47% on year to ₹62 crore due to strong sales and better operating performance. “Overall 1Q [first quarter] results were in line with expectation. Hence we are positive on stock,” said Amarjeet Maurya of Angel Broking.IRCTC has a dominant market share of close to 73% in reserved rail tickets, the company said in an investor presentation. Shares of the company have given exemplary returns of 163% in 2021 so far. Analysts believe the stock price is rising because of the company’s aggressive expansion plan in the hospitality sector.Moreover, on August 12, IRCTC approved a stock split in the ratio of 1:5 to enhance the liquidity in the capital market, widen the shareholder base and make the shares affordable to small investors. A stock split is generally done to make the stock more affordable for the small retail investors and increase liquidity. It has fixed October 29 as the record date for the stock split.Reportedly, HAL has an almost 100% market share in aerospace and defence manufacturing. The company is a dominant supplier of aircrafts, helicopters, engines, avionics and accessories as well as main provider of maintenance, repair and overhaul services to the Indian defence forces.The company faces limited competition from the private sector due to the high capital intensity and long gestation periods for developing manufacturing capabilities in the sector, said a report by ICRA. The market leader’s stock has rallied 58% in 2021 so far on triggers of large deal wins. Recently, the company signed a $716 million deal with GE Aviation for supply of engines. The stock’s inclusion in the futures and options segment also fueled the rally for the stock this year.ICICIdirect has reportedly set a target price of ₹1,380 per share for the next three months. The current market price of the share is ₹1,336.60. Coal India has a market share of more than 80% in coal production in India. “Coal India contributes about 80% of India’s domestic coal production,” said the government in a year-end review in 2020. Shares of the market leader have surged 37% in 2021 so far this year.The company reported 52% on year growth in net profits for June quarter to ₹3,174 crore. “Overall the company posted a good set of numbers for the quarter largely driven by volume growth,” said Jyoti Roy, deputy vice president -- equity strategist at Angel Broking. Truck parts maker WABCO India has over 80% market share in medium and heavy vehicles braking systems. Shares of the company have gained 27% in 2021 this year so far.Brokerage ICICI Securities said it likes WABCO’s business model -- dominant market share, improving content/vehicle, multi-year potential medium and heavy commercial vehicles upcycle, low leverage, strong return on capital employed. It has set a target price of ₹7,860 per share. The current share price of the stock is ₹7,252. In June quarter, the company reported a 55% rise in net profit at ₹48 crore. Moreover, according to WABCO India, a well thought out vehicle scrappage policy with incentives is likely to spur demand for commercial vehicles in the short to medium term.Consumer goods company Zydus Wellness has over 90% market share in sugar free products.Its product ‘Sugar Free’ has a strong presence in India with a 94% market share of the sugar substitute category. To accelerate growth and strengthen its position as the market leader the company recently roped in bollywood actor Katrina Kaif as brand ambassador of its low calorie sweetener brand 'Sugar Free'. Zydus Wellness has various brands as well like Complan, Everyuth, Nycil, Glucon-D, Sugarlite and Nutralite.Five of its brands, Glucon-D, Sugar Free, EverYuth Scrub, Peel Off Face Mask and Nycil maintained their leadership positions in-their respective categories as of March 2021, the company said in a BSE statement in May.Its constant market leading position led to 92.7% jump in net profit to ₹133.13 crore in Q4 FY21 from ₹69.10 crore in Q4 FY20. Shares of the company have gained 14% in 2021 so far.The auto manufacturing company holds more than 80% market share in the 250 cc bikes category. Its iconic model Royal Enfield is currently the global leader in the middleweight motorcycle segment (250 cc-750 cc).Analysts at Profitmart Securities expect a normal monsoon to aid tractor sales of Eicher Motors. The auto company manufactures commercial vehicles and motorcycles. Since, commercial vehicles are expected to get a boost after the scrappage policy announcement, this auto company can be one of the major beneficiaries of this central government's move in [the] long-term. Apart from this, unlock activities are fast gaining momentum,” said Avinash Gorakshkar, head of research at Profitmart securities while recommending to buy Eicher Motors shares for both medium to long-term time horizon. Shares of the company have gained 10% in 2021 so far.Multi Commodity Exchange of India (MCX) is the largest commodity futures exchange in India with a market share over 80%. MCX has a near monopoly position in bullion metals, base metals, and crude oil trading in India.Apart from it, the fact that many well known investors have picked up stakes in the company has lured investors. Rakesh Jhunjhunwala, one of the marquee investors, has 4.9% stake in the company. However, the net profit of MCX declined 29.47% to ₹39.80 crore in June quarter as against ₹56.43 crore last year. The stock has not performed well in 2021 so far as it has fallen 4%. Meanwhile, analysts at ICICI Securities have set a target price of ₹1,890 for the company’s stock on its ability to recover volumes sooner. The current share price of the stock is ₹1,669.95.