Futures steady amid earnings, oil slide

U.S. stock index futures indicated a flat to slightly higher open Wednesday as investors eyed more earnings.

Oil traded lower, but U.S. crude oil futures for May delivery held above $40 a barrel in early morning trade ET. The contract rolls to June after the settle.

Earlier declines in oil prices weakened sentiment across the globe. European stocks were narrowly mixed while Asian stocks ended mostly lower. The Shanghai composite fell 2.3 percent, amid reports that China's central bank may not ease as aggressively this year.

In U.S. political news, Donald Trump will notch a "significant" victory in the New York GOP primary, according to NBC News which cited projected results from Tuesday's polls. On the Democratic side, former Secretary of State Hillary Clinton was projected to win her party's primary, according to the news agency.

Meanwhile, inventors will head into the session with a slew of earnings before the opening bell. Coca-Cola, U.S. Bancorp, Abbott Labs and St. Jude Medical reported then. American Express, Qualcomm, Mattel, F5 Networks, Stryker, SLM and Yum Brands will release updates after the session.

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U.S. stocks closed mixed Tuesday, amid a rise in oil prices, as declines in tech and consumer discretionary stocks weighed after mixed earnings reports. Goldman Sachs was the main focus with shares closing up 2.28 percent with the firm reporting first-quarter earnings that topped lowered Wall Street expectations.

Back in the U.S., existing home sales data will be released at 10 a.m. ET.