US Stock Market Summary — August 20, 2026

The three major indices gave back the prior session's rebound in a single day. Today, the sector that hit the brakes was the American shopping basket. Walmart, the largest US retailer, posted solid profits, but in-store sales came in below expectations (BBC). Investors read this as a sign that consumers are starting to tighten their wallets, sending the stock down more than 9% and dragging the Dow by more than 700 points (MarketWatch).

Of the 11 sectors, only two finished higher: energy and real estate. Money flowed out of equities and into hard assets such as oil and silver. Capital that had crowded into healthcare the previous day unwound within 24 hours, and the lone equity pocket to hold up was memory chips. The semiconductor ETF (SOXX) gained 0.52%, staying green even as the Nasdaq fell 1%.

> The major events for the next trading day will be displayed automatically.

> "Investor sentiment has been shaken since the company held to its conservative guidance last quarter. A modest upward revision this time may not be enough to restore confidence."

> — Sky Cannabis, Chief Analyst at eMarketer (on Walmart's results)

> "Because expected returns are high and firms feel pressure to secure capacity ahead of time, AI investment barely flinches even when rates rise. One of the main channels through which tightening cools the economy has effectively gone blunt."

> — Torsten Slok, Chief Economist at Apollo Global Management

A total of 240 technical signals were generated today, with bullish and bearish readings split exactly down the middle at 120 each. On the surface, the market looks balanced, but underneath the picture is more fractured. At the top of the RSI oversold and lower-Bollinger-Band breach lists, Walmart and GE Aerospace appear side by side, underscoring how steep today's declines were. On the opposite end, Microsoft, Amazon and JPMorgan Chase surfaced on the MACD death-cross (a signal in which a short-term trendline slips below a long-term trendline) side. Per-stock signals can be reviewed at Today's Signals. For tomorrow, there is really only one thing worth watching: whether long-term Treasury yields come back down.