Advance Auto Parts −24.5%: its second-worst day in 17 years, 82% below the 2021 peak

Advance Auto Parts closed at $42.39 on August 20, 2026, down 24.5% on 17.2 million shares — 8.3 times its trailing 63-session average. In our record, which begins at the end of 2009, only May 31, 2023 (−35.0%) was a worse day. The stock is 82% below its November 15, 2021 peak of $241.91. The quarter behind the move: revenue of $2.0 billion, flat year over year and below the $2.04 billion consensus; full-year guidance of about $8.53 billion, under the $8.58 billion the Street carried; and management’s line that DIY demand is constrained by “tighter household budgets.”

Adjusted earnings beat ($1.03 against $0.81), which is why the move reads as a verdict on the top line and the consumer behind it. One company’s guidance is one data point, and the aftermarket has been losing share to the two larger chains for years. The session’s volume flag, and the rest of the day’s unusual activity, are on the live page.