NEW YORK (AP) — A rise in oil prices on Thursday is sending worries about inflation and yields in the bond market higher, erasing some of the relief the U.S. Treasury Department created the day before. A drop for Walmart following its latest profit report also helped drag the U.S. stock market lower.

The S&P 500 slipped 0.2% and is on track for a fourth loss in the five days since setting its all-time high last week. The Dow Jones Industrial Average was down 305 points, or 0.6%, as of 9:35 a.m. Eastern time, and the Nasdaq composite was 0.3% lower.

The bond market remains the center of action after yields charged higher through the summer on worries about high inflation, gargantuan government debts and other factors. Treasury Secretary Scott Bessent made a move Wednesday that jolted financial markets to at least double the size of his department’s planned purchases of longer-term Treasurys from Sept. 9 through Nov. 4.

That helped push yields down after the 10-year Treasury’s yield had hit its highest level in more than a year and the 30-year yield got back to where it was in 2007, before the Great Recession sent yields toward zero worldwide. It’s a big deal because high yields slow the economy by raising interest payments for people, companies and the government and can undercut prices for stocks and other investments.

But analysts had cautioned the effect may be short lived, given how small the purchases are relative to the overall size of the Treasury market and other factors. Plus, more signals arrived quickly to push the bond market’s worries higher.

The U.S. government’s debt topped $40 trillion on Wednesday, a staggering record that arrived just months after the national debt first blew past the $39 trillion mark in April, because Washington continues to spend far more money than it brings in.

And on Thursday, the price for a barrel of Brent crude climbed 2.4% to $93.83 as uncertainty continues about when the war with Iran will allow oil tankers to freely exit the Persian Gulf again. President Donald Trump threatened Iran with “Economic Warfare and Isolation on an unprecedented scale” late Wednesday but provided few details.

That helped push the 10-year Treasury up to 4.69% from 4.65% late Wednesday. It’s almost back to its 4.71% level from late Tuesday, before the Treasury Department made its announcement.

A couple encouraging reports on the U.S. economy also helped push up longer-term Treasury yields, which move with expectations for the economy and inflation in coming years. One said fewer U.S. workers applied for unemployment benefits last week than economists expected, while another said manufacturing in the mid-Atlantic region appears to be much stronger than expected.

On Wall Street, Walmart was the heaviest weight on the S&P 500 lower and fell 7.5% even though it reported stronger profit and revenue for the latest quarter than analysts expected. Investors focused more instead on how an important underlying measure of revenue growth at its stores slowed again. Its forecast for profit in the current quarter also fell short of analysts’ expectations.

Advance Auto Parts tumbled 19.8% after the retailer reported weaker revenue for the latest quarter, even though its profit topped expectations. CEO Shane O’Kelly said that “tighter household budgets constrained spending more than we anticipated, especially during the last four weeks of the quarter.”

Helping to keep Wall Street’s losses in check was Deere, which reported stronger profit and revenue for the latest quarter than analysts expected. It rose 3.6% as the company said order trends indicate the agriculture equipment business looks set to accelerate after this year.

In stock markets abroad, indexes dipped in Europe following a stronger finish in Asia.

South Korea’s Kospi soared 5.9% for one of the world’s biggest moves after the two tech titans that dominate its market, Samsung Electronics and SK Hynix, jumped.

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AP Business Writers Chan Ho-him and Michelle Chapman contributed to this report.