U.S. stock index futures rose, gaining back about a third of Thursday's 10% plunge, as hopes of stimulus lingered after tepid policy responses around the world led to Wall Street's worst day since 1987's Black Monday.

Contracts on the S&P 500 that expire in June rose 3.4% as of 9:23 a.m. in London, after dropping as much as 3.1% earlier. The underlying gauge sank 9.5% Thursday, leaving it 27% from a record set just three weeks ago and ending the longest bull run in history.

In Europe, the Stoxx 600 Index was up 2.3% up, after falling most on record Thursday. The index is set for its worst week since the global financial crisis.

Source : Bloomberg