At the end of trade today, TCS commanded a market cap of Rs 2,79,804 crore, the highest for any listed company in the country. This is about Rs 339 crore more than the ONGC's m-cap.
Shares of TCS ended 0.31% higher, while ONGC settled with a loss of 0.53% on the BSE.
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Last week on Thursday, ONGC had surpassed the market value of TCS, but the energy major's rein at the top position proved to be short-lived with the IT major reclaiming the coveted position today.
Reliance Industries with a market capitalisation of Rs 2,59,989 crore was at third position, followed by ITC (Rs 2,50,804 crore) and Coal India (Rs 1,96,786 crore).
Market capitalisation or the value of a listed company is arrived at by multiplying the total number of its shares with its stock price on a particular day or time. This figure changes daily with the change in the stock price.