By Carla Mozee, MarketWatch

LONDON (MarketWatch) -- U.S. stock futures turned higher Tuesday, a day after a brutal selloff, but a continuing slide on oil prices could keep gains in check during Wall Street's trading day.

Futures for the Dow Jones Industrial Average (SPH5) swung higher by 27 points, or 0.2%, to 17,477, erasing earlier losses, and those for the S&P 500 index (SPH5) picked up 3.5 points, or 0.2%, to 2,019.40. Futures for the Nasdaq 100 (NDH5) rose 5 points, or 0.1%, to 4,166.75.

On Monday, U.S. stock markets took a battering as crude-oil prices slid again and as the dollar (DXY) surged. The S&P 500 marked its biggest one-day loss in three months, falling 37.62 points, or 1.8%. The Dow (DJI) also had its worst down day since October, dropping 331.34 points as 28 of its 30 components closed lower. The Nasdaq Composite (RIXF) fell 1.6%.

"One would question whether this is 'Turnaround' Tuesday or simply a pause before the next leg down," said Brenda Kelly, chief market strategist at IG, in emailed comments. "The plunge in equities yesterday was unexpectedly extreme so we may be witnessing some profit taking and an element of bargain hunting."

Overall, "we are still in a low-interest-rate environment, and as has been the case for the past few months, risky assets provide a yield that cannot be gleaned elsewhere," she wrote.

Crude extended losses on Tuesday, with U.S. oil futures (CLG5) down nearly 2%, trading just above $49 a barrel. Brent futures were down 2%, but off intraday lows.

"The economic conditions that oil faces continue to be aggressively against the commodity, making buyers extremely hesitant to even consider entering long positions," said Jameel Ahmad, chief market analyst at FXTM, in a Tuesday note. "There are also suspicions that as oil companies struggle to adapt to lower profits, there could be mergers and acquisitions taking place in the future and this will weigh on investor sentiment. What's the answer to this equation? Bearish moves for oil."

Investors will get a look at activity in the services sector when the Institute for Supply Management releases December data at 10 a.m. Eastern. ISM's manufacturing index, released Friday, showed a slowing in U.S. activity. A report on factory orders in November is also due at 10 a.m. Eastern.

There are no Federal Reserve speakers scheduled for Tuesday, ahead of the release Wednesday of minutes from the Federal Open Market Committee's meeting in mid-December. But the key data event this week is the U.S. monthly jobs report for December, due Friday.

Stocks to Watch: Verizon Communications Inc. (VZ) has approached AOL Inc.(AOL) about a possible acquisition or joint venture, Bloomberg reported Monday, citing people with knowledge of the matter.

Cyberonics Inc.(CYBX) shares fell Monday evening after the medical device maker said an appeals board supported a 2007 decision by the Centers for Medicare and Medicaid denying coverage of the company's pacemaker-like device for treating depression.

Coach Inc. (COH) shares were up 1.5% in premarket trade Tuesday after the company said it's buying luxury footwear brand Stuart Weitzman from private equity firm Sycamore Partners, in a deal valued at up to $574 million.

Other markets: Meanwhile, the yield on the 10-year Treasury fell below 2%, to 1.99%, according to Tradeweb. Yields have been hitting lows not seen in almost two years, discounting the mini flash-crash in mid-October, indicating investors are looking to bonds as a safe haven.

In Asia, the Nikkei fell 3% to post its biggest one-day loss in nearly 10 months, and Indian shares plummeted 3.1%, the steepest loss since September 2013. European stocks turned higher, pushing back from a loss that followed a clutch of lackluster economic data.

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