Stocks slumped on Wall Street Tuesday as traders worried that the U.S. and China made less progress than originally thought on defusing their dispute over trade. Bond prices surged, sending yields sharply lower as investors turned to lower-risk assets.

The Dow Jones Industrial Average fell nearly 800 points and the yield on the benchmark 10-year Treasury note declined to its lowest level in three months.

The wave of selling erased the market's gains from a day earlier, when stocks rallied after the administration said U.S. and China agreed to a temporary truce in their trade dispute. Investors' confidence in that truce faltered Tuesday, contributing to renewed fears that the disagreement between the two economic powerhouses could slow the global economy.

"This trade issue is the big overhang, the biggest ceiling, if you will, to keeping the markets from moving higher," said Randy Frederick, vice president of trading & derivatives at Charles Schwab.

Technology companies, banks and industrial stocks accounted for much of the broad sell-off. Utilities stocks rose. Smaller-company stocks fell more than the rest of the market.

Big losses for Boeing and Caterpillar, major exporters which would stand to lose much if trade tensions persist, weighed on the Dow.

The bond market signaled its concerns as the gap between two-year and 10-year Treasurys reached its narrowest difference since 2007. The 10-year yield is still higher, but not by much.

When yields for long-term bonds drop lower than yields for short-term bonds, it's what economists call an "inverted yield curve." It indicates that investors are forecasting a weaker economy and inflation in coming years. An inverted yield curve has also preceded each recession of the last 60 years, though sometimes by more than a year.

"You have the drop in bond yields and the implications on growth going forward," said Willie Delwiche, investment strategist at Baird. "The bigger issue is you have this unwind from yesterday's rally."

The S&P 500 index slid 90.31 points, or 3.2 percent, to 2,700.06. The Dow plunged 799.36 points, or 3.1 percent, to 25,027.07, more than erasing its 488-point gain over the previous two trading days. It was down as much as 818 points earlier.

The technology-heavy Nasdaq composite lost 283.09 points, or 3.8 percent, to 7,158.43.

Small-company stocks, which investors see as more risky than large multinationals, fell more than the rest of the market. The Russell 2000 index gave up 68.20 points, or 4.4 percent, to 1,480.76.

The sell-off came ahead of Wednesday's closure of U.S. stock and bond markets in observance of a national day of mourning for former President George H.W. Bush.

The sharp turn in the markets followed a strong rally on Monday fueled by optimism over the news that President Donald Trump and his Chinese counterpart Xi Jinping had agreed at the G-20 summit over the weekend to a temporary, 90-day stand-down in the two nations' escalating trade dispute.

But the market's optimism faded Tuesday amid published reports questioning the scant details out of the Trump-Xi talks and growing skepticism that Beijing will yield to U.S. demands anytime soon.

"The actual amount of concrete progress made at this meeting appears to have been quite limited," Alec Phillips and other economists at Goldman Sachs wrote in a research note.

Delwiche echoed those doubts.

"The sense is that there's less and less agreement between the two sides about what actually took place," Delwiche said. "There was a rally in the expectation that something had happened, the problem is that something turned out to be nothing."

Moody's Investors Service suggested in a report Tuesday that despite the latest U.S.-China talks, both countries remain far from resolving their dispute.

"Narrow agreements and modest concessions in their ongoing trade dispute will not bridge the wide gulf in their respective economic, political and strategic interests," Moody's analysts wrote.

The trade dispute has rattled markets in recent months as signs emerged that it has begun affecting corporate profits. That's stoked traders' fears that if it drags much longer it could further weigh on global economic growth.

"There are plenty of reasons to believe that growth in either the economy or the markets is going to soften next year," Frederick said.

The jitters helped drive demand for government bonds Tuesday, pushing prices higher. The yield on the 10-year Treasury note fell to 2.91 percent from 2.99 percent late Monday, a large move. The slide in bond yields, which affect interest rates on mortgages and other consumer loans, weighed on bank stocks. Citigroup fell 4.5 percent to $62.26.

Chipmakers were among the biggest decliners in a technology sector slide. Advanced Micro Devices dropped 10.9 percent to $21.12, while Micron Technology lost 7.9 percent to $36.88.

Homebuilders fell after luxury homebuilder Toll Brothers issued a cautious assessment of the housing market. Toll's shares slid 1.6 percent to $32.99.

Apple lost 4.4 percent to $176.69 after the consumer electronics giant was downgraded by HSBC analysts, citing the possibility that iPhone volume and value growth may moderate due to a saturated mobile phone market.

United Parcel Service slumped 7.4 percent to $106.77 and FedEx dropped 6.3 percent to $215.52. Morgan Stanley analysts said in a note that the market was underestimating the challenge those companies would face from Amazon Air.

Oil prices rose ahead of an OPEC meeting on Thursday, where members are expected to agree to cut output in 2019. Benchmark U.S. crude gained 0.6 percent to settle at $53.25 per barrel in New York. Brent crude, the international standard, added 0.6 percent to close at $62.08 per barrel in London.

The dollar weakened to 112.82 yen from 113.69 yen late Monday. The euro was little changed at $1.1342. The British pound fell to $1.2716 from $1.2728.

Gold gained 0.6 percent to $1,246.60 an ounce. Silver rose 1 percent to $14.64 an ounce. Copper fell 1.8 percent to $2.78 a pound.

Wholesale gasoline gained 0.8 percent to $1.44 a gallon. Heating oil climbed 0.7 percent to $1.90 a gallon. Natural gas picked up 2.7 percent to $4.46 per 1,000 cubic feet.

Overseas, Germany's DAX lost 1.1 percent, while France's CAC 40 dropped 0.8 percent. The FTSE 100 index of leading British shares slid 0.6 percent.

Japan's Nikkei 225 index gave up 2.4 percent and the Kospi in South Korea lost 0.8 percent. Hong Kong's Hang Seng added 0.3 percent.