Mumbai, November 17: On Friday, the Indian equity markets closed the trading day in the green. The benchmark 30-share Sensex closed more than 70 points or 0.17 per cent higher at 40,356.69, which was still above the psychological mark of 40,000. Nifty too was in the green with the Nifty 50 closing the day more than 23 points or 0.20 per cent higher at 11,895.45. However, it could not regain the psychological mark of 12,000. The equity markets, during the week gone by, were volatile and almost akin to a tale of two cities – the best of times and the worst of times. On one hand, growth challenges remain, while on the other hand structural policy measures such as the corporate tax cut should help in bringing about improvement in corporate profitability and spur investment led recovery over the medium term.