India, Oct. 7 -- The Indian equity markets are trading under pressure today, Wednesday, October 7th, as the Sensex index tumbles significantly after the Reserve Bank of India (RBI) raised its key interest rate by 25 basis points. As per the policy decision, RBI raised its repo rate from 5.25 percent to 5.5 percent and changed its monetary policy outlook from 'neutral' to 'calibrated tightening'. The Sensex index saw significant selling pressure early in the day and fell up to 529 points or 0.7 percent to 72,539.18. But the index soon gained back some ground after seeing recovery in the performance of the financial sector stocks after the RBI's decision. At 11:06 am IST, the Sensex index was down 0.13 percent at 72,976.86, whereas the Nift...