In the last six trading days, the Sensex, BSE's benchmark index, has declined a record 3,222.10 points - from 20,827.45 to 17,605.35.
The total market capitalisation of the actively-traded stocks fell by Rs 11,85,687 crore (Rs 11.85687 trillion) to Rs 59,53,526 crore (Rs 59.53526 trillion).
The aggregate market value of equity shares in which FIIs hold stake was eroded by Rs 164,518 crore (Rs 1.64518 trillion) during the trading days.
FIIs' total wealth in the Indian equity market declined from Rs 10,17,567 crore (Rs 10.17567 trillion) on Friday, January 11 to Rs 853,049 crore (Rs 8.53049 trillion) on Monday, January 21 - a little over 16 per cent.
The total market wealth of promoters, too, declined by Rs 6,97,934 crore (Rs 6.97934 trillion) to Rs 34,12,232 crore (Rs 34.12232 trillion) (from Rs 41,10,166 crore over the same period, a fall of over 20 per cent.
The total market wealth of retail investors eroded by Rs 106,920 crore (Rs 1.06 920 trillion) (over 16 per cent) and that of financial institutions - including banks, mutual funds and insurance companies - by Rs 91,669 crore (Rs 916.69 billion).
Insurance companies lost Rs 41,789 crore (Rs 417.89 billion), mutual funds (Rs 37,317 crore (Rs 373.17 billion) and banks Rs 12,563 crore (Rs 125.63 billion).
FIIs' market value in five stocks - Reliance Industries, ICICI Bank, Bharti Airtel, Reliance Capital and HDFC - depreciated by over Rs 47,000 crore (Rs 470billion). In 28 firms, their market wealth declined Rs 1,000 crore (Rs 10 billion) to Rs 4,000 crore (Rs 40 billion). Reliance Industries Rs 15,895 crore (Rs 158.95 billion) and ICICI Bank Rs 11,858 crore (Rs 118.58 billion) were major losses for the FIIs.
FIIs have made a record investment in the equity markets in the last two calendar years. The findings are based on data culled from the latest shareholding patterns of the companies available and the assumption is that there has been no change in stake till date.