老柏大嘴一吹，股市就鼓泡泡，没消息涨坏消息不跌，反正有伯伯照应。

U.S. stock index futures added to losses on Thursday after disappointing readings on economic growth and the labor market.

First-quarter gross domestic product rose 1.8 percent, less robust growth than forecast, while jobless claims unexpectedly rose in the latest week.

S&P 500 futures fell 3.9 points and were below fair value, a formula that evaluates pricing by taking into account interest rates, dividends and time to expiration on the contract. Dow Jones industrial average futures fell 21 points and Nasdaq 100 futures lost 5.5 points.