Stock futures declined Tuesday as the S&P 500 comes off its fifth consecutive week of gains and investors looked ahead to two days of testimony from Federal Reserve Chairman Jerome Powell before Congress.

These stocks were poised to make moves Tuesday:

American depositary receipts of Alibaba $(BABA)$ fell 2.2% in premarket trading after the Chinese e-commerce giant said Daniel Zhang will be stepping down as chairman and chief executive. He will remain as leader of the company's cloud intelligence group, which the company announced last month would be spun off.

Executive Vice Chairman Joseph Tsai will become chairman. Eddie Wu, who serves as the chairman of Alibaba's Taobao and Tmall Group e-commerce businesses, will take over as chief executive. The appointments of Tsai and Wu are effective Sept. 10.

Boeing $(BA)$ was rising 0.7% even after it was announced at the Paris Air Show that rival Airbus had secured an order for 500 passenger jets from India's IndiGo airline. The companies didn't disclose the value of the order, but it likely would amount to tens of billions of dollars, MarketWatch reported.

Intel $(INTC)$ gained 0.5% after the Israeli government said the chip maker said was investing $25 billion to manufacture semiconductors in the country, just days after Intel announced a new facility in Poland.

United Parcel Service ( UPS) edged lower in premarket trading after the International Brotherhood of Teamsters union said Friday that members had overwhelmingly voted to go on strike if a collective bargaining agreement with the shipping giant isn't reached by the expiration of their current deal.

Earnings reports are expected after the closing bell Tuesday from shipping giant FedEx $(FDX)$ and residential furniture company La-Z-Boy $(LZB)$. Reports are expected later in the week from Darden Restaurants $(DRI)$ , Accenture $(ACN)$, and CarMax $(KMX)$.