US Stock Futures Down as Investors Avoid Risk

U.S. stock index were a bit lower as investors avoid risk ahead of British elections and FBI Director James Comey's much-expected testimony before Congress.

Comey plans to talk about conversations in which President  Trump pressured him to drop his investigation into Mike Flynn. Flynn was fired for failing to disclose conversations with Russian officials.

British Prime Minister Theresa May's lead over the opposition Labour Party ahead of the general election  has narrowed to just 1% point, according to a poll conducted on Friday and Saturday before the latest attacks in London.

Oil prices fell further below  , concerns that a diplomatic rift between Qatar and several Arab states, including Saudi Arabia, could undermine efforts by OPEC to tighten the market.

Wall Street slipped on Monday as a drop in Apple partly offset gains in energy and financial stocks, some of the market's worst-performing sectors so far .

Still, stocks continue to levitate around record levels, helped by a strong first-quarter corporate earnings season.

Investors are also keeping an eye on economic data after services sector activity slowed in May and worker productivity remained unchanged in the first quarter, suggesting limited scope for faster economic growth.