UPDATE: 10:30 a.m.

NEW YORK >> Wall Street roared higher, adding to its rally from the day before on hopes the Federal Reserve may finally be done with its market-rattling hikes to interest rates.

The S&P 500 jumped 1.9% today. The Dow added 564 points, and the Nasdaq composite climbed 1.8%.

Stocks around the world leaped after the Federal Reserve late Wednesday hinted that a recent jump in Treasury yields may be acting like a rate-hike substitute. The 10-year yield fell further today, releasing pressure that had built on Wall Street. Reports on the U.S. economy also offered hope for momentum pulling down on inflation.

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NEW YORK >> Wall Street is roaring higher today and adding to its rally from the day before on hopes the Federal Reserve may finally be done with its market-rattling hikes to interest rates.

The S&P 500 was 1.8% higher in late trading and on track for a fourth straight winning day. It’s already up 4.8% this week and on pace for its best week in nearly a year.

The Dow Jones Industrial Average was up 503 points, or 1.5%, with roughly an hour remaining in trading, and the Nasdaq composite was 1.7% higher.

Stocks around the world leaped after the Federal Reserve late Wednesday opted against raising its main interest rate for a second straight meeting. It’s already jacked up rates furiously since early last year in hopes of slowing the economy and hurting financial markets enough to starve high inflation of its fuel.

More importantly for financial markets, investors also took comments by the Fed’s chair to mean that recent jumps in longer-term Treasury yields were acting like rate-hike substitutes and could obviate the need for more increases by the Fed.

Longer-term Treasury yields fell as Fed Chair Jerome Powell spoke following the central bank’s decision, and they kept sinking today. The yield on the 10-year Treasury dropped to 4.67% from 4.74% late Wednesday and from more than 5% last week, when it reached its highest level since 2007.

Lower yields provide oxygen across financial markets. They make it easier for businesses and households to get loans, encourage investors to consider paying higher prices for stocks and reduce the pressure on the entire financial system.

Of course, the drop in yields could end up shooting Wall Street in the foot later. Powell said that a run higher in Treasury yields could displace the need for another rate hike if it is “persistent.” If the 10-year yield ends up quickly dropping back to where it was in the summer, that could make the Federal Reserve more nervous.

“That was an interesting nuance, but I don’t think it overrides the majority of his comments that suggested it’s more likely than not that the Fed is done hiking,” said Lon Erickson, portfolio manager at Thornburg Investment Management.

Hopes for no more Fed hikes had financial markets around the world ebullient. Stock indexes jumped 1.8% in South Korea, 1.1% in Japan, 1.5% in Germany and 1.8% in France.

In London, the FTSE 100 climbed 1.4% after the Bank of England left its main interest alone, like the Fed.

Some reports on the U.S. economy also showed a bit of momentum that could help ease the pressure on high inflation. Fed officials are waiting for enough such such data before they say they’re comfortable rates are high enough to sustainably drive inflation back down to their 2% target.

One preliminary report today said U.S. businesses produced more stuff during the summer than the number of hours worked increased, indicating they got more efficient. Such gains in productivity could ease pressure on inflation while helping the economy to grow.

Productivity looks like it may be set for a continued uptrend over the next two years, aided in part by adoption of artificial-intelligence technology, according to economists at Deutsche Bank.

A separate report, meanwhile, said slightly more U.S. workers applied for unemployment benefits last week than expected. That’s bad news for those workers, but a cooler job market could also take pressure off inflation.

Big U.S. companies meanwhile continue to report better profits for the summer than analysts expected.

Eli Lilly was one of the strongest forces pushing the S&P 500 upward after it reported stronger profit and revenue than analysts estimated. Its stock rose 3.8% after it said it benefited from soaring sales for its blockbuster diabetes treatment, Mounjaro, which is widely used for weight loss.

Starbucks jumped 10.3% after reporting stronger profit and revenue for the latest quarter than Wall Street forecast. It benefited from customers buying more and paying higher prices.

Also today, Cedar Fair and Six Flags said they’ll merge to create an expansive amusement park operator with operations spread across 17 U.S. states and three countries. Their stocks were mixed, but both remain up more than 7% this week after rumors of the deal spread.

On the losing end of Wall Street was Moderna, which sank 8.1% after reporting a much worse loss for the latest quarter than analysts expected.

More swings could be coming for Wall Street. After trading closes for the day, Apple will report results for its latest quarter. As the most valuable U.S. stock, its movements carry extra weight on the S&P 500 and other indexes.

Earlier this reporting season, some of the market’s other most influential Big Tech stocks dragged on indexes after their results failed to live up to very high expectations.

On Friday morning will come the latest monthly update on the U.S. jobs market. Economists expect it to show a slowdown in hiring for October.

A remarkably resilient job market has helped to keep the economy out of a long-predicted recession, but the fear at the Fed is too much strength there could push upward on inflation.