Mumbai, May 23 -- Indian benchmark indices opened flat on Friday, showing signs of volatility mainly due to uncertain foreign portfolio investor (FPI) activity.

The Nifty 50 index opened at 24,639.50, gaining 29.80 points or 0.12 per cent. On the other hand, the BSE Sensex opened slightly lower at 80,896.51, down by 55.48 points or 0.07 per cent.

Experts said the current volatility in the market is largely due to turmoil in the global bond markets. FPIs are frequently changing their stance, buying equities on one day and selling them the next, adding to the uncertainty in Indian markets.

Ajay Bagga Banking and Market Expert told ANI "Indian markets are seeing a huge volatility in FPI flows, with large outflows on a day followed by infl...