US stock futures extend drop on BoE, retail sales

NEW YORK, Aug 3 (Reuters) - U.S. stock futures fell further on Thursday as the Bank of England's surprise interest-rate hike stirred concern about more global rate increases ahead, while retail sales pressured sentiment.

S&P 500 futures were down 5.70 points, below fair value, a mathematical formula that evaluates pricing by taking into account interest rates, dividends and time to expiration on the contract.

Dow Jones industrial average futures fell 30 points, and Nasdaq 100 futures were down 8.50 points.

REUTERS CS BD1722