By Anna Isaac and Alexander Osipovich 

U.S. stocks bounced back Wednesday as investors snapped up risky assets, in hopes that the sharpest economic impacts of the coronavirus epidemic are over.

The Dow Jones Industrial Average gained 402 points, or 1.5%, in morning trading. The S&P 500 rose 1.5%, while the Nasdaq Composite jumped 1.8%.

Investors were hoping for markets to stabilize after the Dow fell more than 1,900 points Monday and Tuesday in its largest two-day point decline on record. Markets were spooked this week by a growing number of coronavirus cases outside China and fears that the epidemic would dent corporate earnings and global growth.

"You're seeing a bit of a relief rally," said Jon Adams, senior investment strategist at BMO Global Asset Management. "There is some hope that we've reached maximum impact from the coronavirus."

Treasury yields also ticked higher. The yield on the benchmark 10-year note rose to 1.352% in volatile trading. On Tuesday, it settled at an all-time low of 1.328% as fund managers sought the safety of government bonds, extending a decadeslong rally.

Yields had been under pressure in recent days in part because of a growing expectation among investors that the Federal Reserve may cut interest rates at least two times later this year.

Still, the situation remains highly fluid, with investors jittery over any fresh news about outbreaks of the coronavirus and governments' efforts to contain them.

"This is a time of peak uncertainty for coronavirus," said Edward Park, deputy chief investment officer at Brooks Macdonald. "We don't yet know the size of how much it's spread or the mortality rate. That's what markets are reacting to, peak uncertainty, rather than facts."

The recent surge in volatility in U.S. equity markets showed some signs of abating. The Cboe Volatility Index, a closely watched measure of market turbulence known as VIX, fell more than 9% Wednesday, a day after hitting its highest levels in more than a year.

In Europe, the pan-continental Stoxx Europe 600 wavered between gains and losses, and was recently down less than 0.1%.

Earlier, Asian markets closed lower. Japan's Nikkei 225 index shed 0.8% to reach its lowest level since October. Australia's S&P/ASX 200 dropped 2.3% and Korea's Kospi retreated 1.3%.

Crude oil prices gained, reversing three days of losses, after fresh data on Wednesday showed U.S. crude inventories rose less than expected. U.S. crude futures gained 0.8% to $50.32 a barrel.

Deaths and confirmed cases of the coronavirus have continued to climb outside China -- notably in Italy, Iran, Japan and South Korea. Concerns among investors that the virus will spread further, disrupting the global economy, triggered the two sharp consecutive stock selloffs this week.

Many European and Asian benchmarks, including those in Germany, Japan, and South Korea are now solidly in negative territory for the year. Germany's DAX is down more than 3% year-to-date, while Hong Kong's Hang Seng Index and the Kospi in Seoul have both declined more than 5%.

"The market is pricing in a significant slowdown in global growth and corporate earnings," said Ong Zi Yang, senior macro analyst at FSMOne.com in Singapore. "It is hard to quantify the economic impact now but there will definitely be a slowdown."

In currencies, the British pound fell 0.6% against the dollar amid concerns about the government's mandate for trade talks with the European Union, which is due to be made public Thursday.

Chong Koh Ping contributed to this article.

Write to Anna Isaac at anna.isaac@wsj.com and Alexander Osipovich at alexander.osipovich@dowjones.com

(END) Dow Jones Newswires

February 26, 2020 11:19 ET (16:19 GMT)

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