U.S. futures restore lost strength after rough week

U.S. stock index futures rose sharply ahead of Friday's open as worries over rising rates subsided and tech shares rebounded from steep losses earlier this week.

Futures for the Dow Jones Industrials screamed higher 246 points, or 1%, to 25,431

S&P 500 futures gained 28 points, or 1%, to 2,773.50, while futures for the NASDAQ composite leaped 110.5 points, or 1.6%, to 7,141.50

Futures climbed as tech shares rose sharply in the pre-market. Amazon and Apple both rose more than 2%, while Netflix surged more than 3.5%. Facebook, meanwhile, gained 1.5% and Twitter jumped 2.6%.

Stocks have also fallen this week as tech — the biggest S&P 500 sector by market cap weight — has lost nearly 6.8% through Thursday's close. These losses have sent the major indexes down more than 5%, on pace for their biggest weekly declines since March.

Sentiment was also lifted by stronger-than-expected third-quarter results from J.P. Morgan Chase, which sent the company's stock up by more than 1%.

In Europe, the German DAX gained 0.5% while France's CAC 40 climbed 0.7%.

Overseas, in Japan, the Nikkei 225 gained 0.5% Thursday, while in Hong Kong, the Hang Seng recovered 2.1%

Oil prices tacked on 68 cents to $71.65 U.S. a barrel.

Gold prices faded $1.60 to $1,226 U.S. an ounce.