US STOCKS-Futures fall as focus turns to corporate earnings

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* Gilead gains on COVID-19 experimental drug update

* Energy stocks rise after OPEC+ agrees record output cut

* Futures off: Dow 0.76%, S&P 0.69%, Nasdaq 0.56% (Adds quote, details; updates prices)

By Medha Singh

April 13 (Reuters) - U.S. stock index futures retreated on Monday after a strong rally last week, with investors bracing for the first-quarter earnings season to underline the coronavirus-induced damage to Corporate America.

The S&P 500 ended a holiday-shortened week on Thursday with its biggest weekly percentage gain in more than four decades as the Federal Reserve rolled out trillions of more dollars to backstop businesses.

But the benchmark index remains about 17% below its mid-February record high amid fears of a deep global recession, as the health crisis sparks production halts and mass furloughs.

JPMorgan Chase & Co and Wells Fargo & Co will kick off the earnings season on Tuesday, with analysts expecting first-quarter earnings at S&P 500 firms to fall 9% compared with a Jan. 1 forecast of a 6.3% rise, according to IBES data from Refinitiv.

"It's definitely going to be ugly across all sectors, but markets have already priced in a large chunk of this," said Hussein Sayed, chief market strategist at FXTM.

"Now the question becomes are we witnessing a new bull market or is there still more pain ahead before the rally becomes sustainable?"

With U.S. jobless claims topping a staggering 16 million in the three weeks to April 4 and 42 states imposing strict stay-at-home orders, investors will also be watching for comments about the economic hit beyond the second quarter.

At 7:46 a.m. ET, Dow e-minis were down 179 points, or 0.76%, S&P 500 e-minis were down 19.25 points, or 0.69% and Nasdaq 100 e-minis were down 46 points, or 0.56%.

Over the weekend, major oil producers agreed to their biggest-ever output cut, but crude prices were subdued on concerns even that would not be enough to head off oversupply with the coronavirus outbreak hammering demand.

Exxon Mobil Corp and Chevron Corp rose more than 1%, while Apache Corp jumped 7% in premarket trading.

Gilead Sciences Inc rose 3% after latest data showed an improvement in the condition of more than two-thirds of severely ill COVID-19 patients following treatment with the drugmaker's experimental drug. (Reporting by Medha Singh in Bengaluru; Editing by Arun Koyyur, Sagarika Jaisinghani and Sriraj Kalluvila)