Why Stocks Just Dropped — and What Walmart and Bond Yields Have to Do With It
Stocks fell on August 20, 2026. The Dow dropped 0.86%, the S&P 500 fell 0.44%, and the Nasdaq lost 0.92%. Two things drove the decline: bond yields went back up, and Walmart reported weaker sales than expected. The drop wiped out most of the gains from the day before and added to a selloff that started on August 18, when stocks slipped over worries about government spending and inflation (Reuters).
To understand why stocks fell, it helps to know what a bond yield is. When you buy a government bond, you are lending money to the government. The yield is the interest rate you earn for doing that. When yields go up, it means the government has to pay more to borrow, and that affects everyone else's borrowing costs too. On August 20, the yield on a 30-year U.S. government bond rose to 5.244%, up a small fraction of a percent from the day before. Shorter-term bond yields dipped briefly, then started climbing again. Oil prices also added to inflation worries: U.S. crude futures closed up 0.5% on August 18 (Reuters). When borrowing costs and energy prices rise together, stock prices tend to suffer.
Walmart's results were the trigger that pushed the market lower. The retailer's stock fell about 8.6% after it missed Wall Street's expectations for quarterly comparable sales, which measures sales at stores open at least a year. Shoppers pulled back on spending (Yahoo Finance). Walmart is the largest retailer in the country by revenue, so its sales numbers are a window into how ordinary Americans are spending. When the biggest retailer reports weaker sales, it raises a question: is the consumer spending that powers the economy starting to slow? This is the second earnings cycle in a row where Walmart's results dragged down the broader market. On June 23, 2026, U.S. stocks fell after weak earnings from Walmart and Alibaba deepened a slide in tech stocks (WSJ).
The current stretch of market trouble started in early June. On June 5, 2026, investors sold off bonds after a strong jobs report raised the possibility that the Federal Reserve might raise interest rates, and the Nasdaq dropped sharply (WSJ). Stocks recovered by June 18, with gasoline prices rising 1.9% (WSJ). The rebound did not hold. On August 18, the Wall Street Journal reported that stocks retreated under the headline "U.S. Stocks Retreat on Worries About AI Trade, Hormuz Fears." The market was juggling several risks at once: heavy government spending, inflation that will not go away, shipping risks in the Strait of Hormuz, and a slowdown in the AI investing boom that had lifted stocks earlier in the year (WSJ). That same day, a separate WSJ report noted that tech stocks fell as a global bond selloff gained speed, ahead of earnings from Walmart, Alibaba, and Deere & Co. (WSJ).
The effects reached beyond the United States. The Canadian dollar hit a near three-month high against the U.S. dollar on August 20, as oil prices rose and Canadian bond yields climbed along with U.S. yields (Reuters). For countries that export commodities like oil, higher prices can boost their currency. But the same forces pushing U.S. stocks lower can also eventually slow global growth, which reduces demand for those commodities.
The bigger picture is that investors are rethinking how much they should be paid for tying up their money in government bonds for 30 years. A 5.244% yield means investors are demanding more compensation because of government spending and inflation risk. Normally, when stocks fall, bonds hold their value and give investors a safe place to park their money. Think of it like a seesaw: when one side goes down, the other goes up. On August 20, both sides went down. Bonds offered no safety net as yields rebounded, erasing the prior day's decline, while stocks fell on Walmart's consumer data (Schwab).
The deeper problem is that two stories are pulling in opposite directions. If bond yields are rising because of government spending and inflation, that should be good for corporate profits in theory, since it signals a growing economy. But Walmart's sales miss suggests consumers are already cutting back. That means higher borrowing costs are hurting demand before they have fully tamed inflation. That combination — weak growth and stubborn inflation — is what economists call stagflation, and it haunted the economy in the 1970s. In a normal inflation scare, stocks and bonds fall together but the growth outlook stays fine. When the country's biggest retailer misses sales targets at the same time bonds are selling off, the market is pricing in a troubling possibility: the Federal Reserve may not be able to cut rates without reigniting inflation, and may not be able to hold rates without breaking consumer demand.
What happens next depends on data the market has not seen yet. Upcoming earnings from Alibaba and Deere, noted in the August 18 WSJ coverage, will help show whether the consumer weakness is just a Walmart problem or a broader slowdown. Until then, the market is left worrying about two risks at once, with neither stocks nor bonds offering clear protection.
