The major equity indices experienced heavy losses in the opening trading. Nifty traded a tad below 15,600. All sectoral indices on NSE traded in the red with the exception of Nifty FMCG index. Reliance Industries, a company that dominates the index, pulled down the market by roughly 6 per cent after the government imposed Rs 6 per litre tax on the sale of gasoline and ATF along with a Rs 13 per litre tax on the export of diesel.