A key index for Indian equities, the 30-scrip sensitive index (Sensex) of the Bombay Stock Exchange, plunged over 300 points, or 1.2 percent, early on Wednesday but began recovering thereafter to stay afloat in the positive territory.The Sensex, which opened the day at 26,063.27 points, was trading at 25,719.79 points in the early session, down 312.59 points or 1.20 percent from the previous day's close at 26,032.38 points.About 90 minutes into trading, it was ruling at 26,094.64 points, with a gain of 62.26 points, or 0.24 percent.The wider 50-scrip Nifty of the National Stock Exchange (NSE) showed a similar trend and was trading at 7,911.70 points, with a gain of 31 points, or 0.39 percent.