Why General Motors (GM) Stock Fell 6.00% in 10 Minutes on Oct 20, 2026
The 6.00% drop was larger than any reaction MoveSurge measured after General Motors headlines between Jul 22, 2026 and Oct 19, 2026; the largest of those was +0.44% in 10 minutes, on Oct 1, 2026.
- GM fell 6.00% in the 10 minutes after the 06:30:00 ET headline, from $83.00 to $78.02.
- 32,490 shares changed hands in those 10 minutes.
- The headline crossed in pre-market trading, 3 hours before the 9:30 ET open.
06:30:00 ET
Reaction by asset (real prices)
| Asset | 2m before | At release | +1m | +10m | +1m % | +10m % |
|---|---|---|---|---|---|---|
| GM | 83.00 | 83.00 | 82.15 | 78.02 | -1.02% | -6.00% |
General Motors (GM) shares fell 6.00% in the 10 minutes after this headline reached the MoveSurge news feed at 06:30:00 ET on Tuesday, October 20, 2026: “GM (General Motors) expects 2026 gross tariff costs to be at the low end of its $2.5 billion to $3.5 billion range”
GM in the first 10 minutes
From a reference price of $83.00 just before the headline, the stock was down 1.02% after one minute and down 6.00%, at $78.02, after 10 minutes. The move kept building after the first minute. 32,490 shares changed hands in those 10 minutes. The headline crossed in pre-market trading, 3 hours before the 9:30 ET open.
Earlier GM headlines and the measured reaction
The 6.00% drop was larger than any reaction MoveSurge measured after General Motors headlines between Jul 22, 2026 and Oct 19, 2026; the largest of those was +0.44% in 10 minutes, on Oct 1, 2026.
General Motors at a glance
| Sector | Industrials |
| Industry | Auto Manufacturing |
| Market value | $73.67 billion (as of Oct 19, 2026) |
Prices are closes of 1-minute bars. Each move on this page is measured from the last completed bar before its headline.
What headline moved General Motors stock on October 20, 2026?
At 06:30:00 ET, this headline crossed: “GM (General Motors) expects 2026 gross tariff costs to be at the low end of its $2.5 billion to $3.5 billion range”. The stock fell 6.00% in the next 10 minutes.
How far did GM move after the headline?
From $83.00 just before the headline to $78.02 10 minutes later, a -6.00% move.
Sources
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GM headline and measured reaction, Oct 20, 2026
— MoveSurge
The headline as it crossed, its timestamp, and the measured price reaction reported on this page.
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