Markets open flat amid tech sell-off, crude surge; Trent leads Nifty gainers

The Sensex, which opened at 74,199.69, was trading at 74,164.21, up just 13.17 points or 0.02%; the Nifty 50 opened at 22,964.50 and was quoting at 22,941.70, up 4.95 points or 0.02% at 9.20 am