U.S. Index Futures Little Changed With Stocks Near Record Levels

Also on Thursday, the European Central Bank will announce a decision on monetary policy.

Stocks in Qatar plunged more than 8 percent overnight to their lowest since January 2016.

In oil markets, Brent crude traded at around $49.31 a barrel on Tuesday, down 0.32 percent, while US crude was around $47.25 a barrel, down 0.3 percent.

Global benchmark Brent retreated 0.4 percent to $49.26, extending Monday's 1 percent slide.

Congress is particularly interested in an alleged exchange between Comey and Donald Trump in which the US President pushed the former FBI head into drop the investigation into Flynn.

In Asia, the Shanghai Composite in China closed 0.35 percent higher, while the Nikkei in Japan closed 0.95 percent lower.

Asian equities finished mixed (http://www.marketwatch.com/story/asian-markets-slip-as-investors-turn-cautious-2017-06-05), and a key dollar index was slightly lower after earlier showing a bigger loss and touching levels last seen in November (http://www.marketwatch.com/story/dollar-falls-against-yen-as-analysts-see-flight-to-safety-due-to-geopolitical-fears-2017-06-06).

"It's hard to pinpoint a single factor but the United Kingdom elections and Comey's testimony will take place on the same day, which is making the market nervous", said Bart Wakabayashi, Tokyo Branch Manager of State Street Bank. The dollar was also impacted by the stronger euro as analysts predicted that the European Central Bank will take a less-dovish tone at its meeting this Thursday.

The ECB may even discuss dropping some of its pledges to ramp up stimulus if needed, four people with direct knowledge of the discussions told Reuters last week.

Sterling was a shade higher at $1.2921 GBP=D4 following its rise overnight to a 10-day high of $1.2940.

In Britain, the latest opinion poll, by Survation for ITV television, showed Prime Minister Theresa May's lead over the opposition Labour Party holding at just 1 percentage point ahead of Thursday's election.

"Even if May does just about enough to increase the majority - that could still potentially be sterling positive", said ING currency strategist Viraj Patel.

Individual movers: Shares in Apple Inc.(AAPL) were trading slightly higher in premarket action, putting the gadgets giant on track to recover somewhat from Monday's 1% drop.

Chinese shares and Hong Kong shares bucked the trend, rising nearly 0.1 percent and 0.35 percent respectively. Contracts on the Dow Jones Industrial Average also declined 0.1 percent to 21,152 on Tuesday.

  • Zachary Reyes