India’s equity markets have been on a roll over the past year. New investors have been entering the market in droves, driven by the soaring indices and the hope that despite all the Covid-19 disruptions, the economy will be able to bounce back, leading to an improvement in corporate fortunes. Between October 1, 2020, and September 30, 2021, the S&P BSE Sensex gained 21,058 points, or 55.32 per cent, indicating the kind of up-move the markets have been witnessing. Business Today’s much-awaited annual compendium of India’s most valuable companies, the BT500 ranking, comes to you against this background. And the results are in line with the rally at the bourses—the aggregate rise in market wealth of the BT500 in 2021 has been to the tune of 43.4 per cent, as…