The top 10 holdings (as on July 31) of equity mutual funds account for a fourth of the funds' equity assets.
The fall in top stocks, a majority large-cap, came when funds decided to shift from mid- and small-caps to large-cap stocks.
In August, the Sensex dropped 6.5 per cent, or 2,000 points. This was lower than what stocks lost then. For instance, RIL, the eighth-most invested stock, where 160 schemes had pumped in Rs 5,370 crore as on July 31, dived 14.5 per cent then.
Other top holdings: IndusInd Bank, Axis Bank, and L&T lost 10 to 13 per cent in August.
India's leading private lenders HDFC Bank and ICICI Bank, too, let down funds. HDFC shares were down 7.5 per cent, while ICICI Bank shares declined eight per cent in August.
Fund managers say the recent fall is not going to sustain. They are using the opportunity to buy shares at a discount.
He added that a fall of eight to 15 per cent may turn out a one-time opportunity in several months to buy more stocks.
Positive returns could come from information technology stocks. Infosys, the third-most invested stock by funds, returned 1.6 per cent. TCS returned 2.2 per cent.
As on July 31, the funds' equity assets were a little less than Rs 4 lakh crore. The top-10 holdings accounted for about Rs 90,000 crore.