2026-10-21

3M Jumps 4% on a Guidance Raise While GM Falls 5% Despite Beating Estimates - Same Earnings Day, Opposite Stock Reactions

Written & reviewed by the TradeSmrt editorial team · 2026-10-21

In this article

What Happened
Why the Same "Earnings Beat" Produced Opposite Stock Reactions
What to Take Away From This
FAQ
Sources

What Happened

On Tuesday, October 20, two of the largest names in U.S. industrials reported third-quarter earnings on the same day: 3M (NYSE: MMM), the maker of Post-it notes and Scotch tape, and General Motors (NYSE: GM). Both companies beat Wall Street's estimates. Their stocks did the opposite of each other. 3M shares jumped 4.14% to close at $168.72 the following session, while GM shares fell roughly 5% - with some intraday readings closer to 7% - sliding into the high-$70s. Two "beat" headlines, two completely different stock reactions, on the very same day. It's a clean case study in why the headline number is rarely the whole story.

Start with 3M. Third-quarter adjusted EPS came in at $2.50, up 12% year over year and above the $2.39 consensus estimate. Adjusted sales rose 4.2% to $6.6 billion, narrowly missing the $6.61 billion analysts had modeled. But investors weren't focused on the revenue miss - they were focused on profitability. Adjusted operating margin expanded to 26.2%, up 110 basis points year over year, while gross margin rose 230 basis points. The Safety & Industrial segment led the way with 7% sales growth, and both that unit and General Industrial beat internal expectations. The number that mattered most, though, was guidance: 3M raised its full-year adjusted EPS outlook to $9.10-$9.15, up from $8.80-$8.95 - the second consecutive quarterly raise this year. CEO Bill Brown called it "another quarter of strong results, with solid sales growth, continued margin expansion, double-digit EPS growth and robust free cash flow." The company also flagged $185 million of expected oil-related cost inflation, which it said it plans to offset through pricing - a detail that read as proactive cost management rather than a warning sign.

GM's numbers looked solid on the surface too. Adjusted EPS of $3.70 edged out the $3.69 consensus, and revenue of $50.02 billion beat the $48.77 billion analysts expected by more than a billion dollars. North American EBIT jumped 43% year over year on a richer truck mix, shrinking EV losses, and lower warranty costs. CEO Mary Barra pointed to $12.3 billion in adjusted EBIT, $12.2 billion in adjusted automotive free cash flow, and $10.97 in adjusted diluted EPS for the first nine months of the year as evidence the business is tracking well for the full year. The board also approved a fresh $20 billion share buyback authorization, on top of $2.5 billion already repurchased in the third quarter that retired 29 million shares. On paper, that's an earnings beat plus a massive capital-return commitment - about as clean a quarter as a company can report.

GM's stock fell anyway. The culprit was guidance. The company narrowed its full-year adjusted EBIT range from $14.0-$16.0 billion to $14.5-$15.5 billion, and its adjusted EPS range from $12.00-$14.00 to $12.75-$13.75. Taken at face value, the new EPS midpoint of $13.25 is actually higher than the old midpoint of $13.00. The problem is that the Street, per LSEG, had already modeled a consensus midpoint of $13.41 - meaning GM's new guidance, while technically an improvement over its own prior range, still landed below what analysts were already pricing in. On top of that, analysts flagged rising commodity, logistics and component costs - including memory chips - as risks that could weigh on 2027 earnings growth. Nine months of solid execution weren't enough to offset the sense that management was managing expectations down rather than signaling more upside ahead.

Why the Same "Earnings Beat" Produced Opposite Stock Reactions

Both companies beat on EPS and revenue. The divergence in stock reaction comes down to a handful of specific differences once you look past the headline numbers.

First, the direction of the guidance change was read very differently. 3M raised its guidance for the second straight quarter - the entire range shifted upward, with both the floor and the ceiling moving higher. GM narrowed its range instead. Arithmetically the midpoint ticked up slightly, but the ceiling came down hard, from $14.00 to $13.75 per share. A narrowed range - even one with a marginally higher midpoint - tends to read as "less room for upside surprises going forward," which is a qualitatively different signal from a guidance range that moves up across the board.

Second, position relative to the Street's own model mattered more than the company's own math. GM's new midpoint beat its own prior guidance, but it still fell short of what analysts had already built into their models. "Did the company's number go up?" and "Is it higher than what the market already expected?" are different questions, and stock prices consistently answer to the second one. 3M's new range, by contrast, came in above what analysts were modeling, which effectively pulled expectations higher rather than just confirming them.

Third, the two companies were at different stages of their own narrative. 3M has spent years working to shed a reputation built on litigation costs, the Solventum spinoff, and sluggish growth; two consecutive guidance raises read as hard evidence that a turnaround is actually taking hold. GM, on the other hand, had already built a good chunk of its truck-and-SUV profitability story and shrinking EV losses into the stock price. In that context, guidance that comes in even slightly below expectations tends to get read as a crack in an already-optimistic thesis, rather than as a neutral update.

Fourth, the $20 billion buyback wasn't enough to offset the guidance disappointment - and that itself is instructive. Buybacks are usually read as a straightforwardly positive signal, since they boost per-share value. But when they land alongside renewed doubts about the pace of future earnings growth, a large buyback can just as easily be read as a company redirecting cash toward shareholders because it doesn't see a better use for it internally. Much of the post-earnings commentary on GM focused on the guidance midpoint and 2027 cost pressures rather than on the buyback news.

What to Take Away From This

"Raising guidance" and "narrowing guidance" are not the same signal, even when the midpoint moves in a similar direction. Check which way the floor and the ceiling each moved before concluding an updated outlook is unambiguously good news.
A company's own guidance change matters less than where the new number lands relative to what the Street already expected. GM's new EPS range beat its own prior guidance but still missed the analyst consensus midpoint, and the latter is what drove the stock.
The same size of earnings beat can produce opposite reactions depending on what narrative stage a stock is in. A turnaround story coming off a low base (3M) reacts strongly to incremental good news; a stock where optimism is already priced in (GM) can sell off on the same news if it falls even modestly short.
Buybacks and dividends don't automatically support a stock. When they're announced alongside a cloudier growth outlook, markets can read capital return as an admission that growth is slowing rather than as pure good news.
Margin expansion often moves a stock more than a revenue beat does. 3M's revenue came in slightly below estimates, yet the stock still rallied because profitability metrics improved more than expected.

FAQ

Why did GM's stock fall when its earnings beat estimates?

The guidance was the problem. GM narrowed its full-year adjusted EPS range from $12.00-$14.00 to $12.75-$13.75. The new midpoint of $13.25 was technically higher than the old midpoint, but it still came in below the $13.41 consensus midpoint analysts had modeled, per LSEG. Combined with analyst concerns about rising commodity and logistics costs heading into 2027, the market focused more on the softer-than-expected forward outlook than on the quarter's actual beat.

Is 3M's stock rally a one-time event or a sustained improvement?

Two consecutive quarterly guidance raises suggest this looks more like a sustained trend than a one-off. That said, part of this quarter's margin improvement reflects an accounting change in how the company treats intangible asset amortization, so it's worth separating the genuine operational gains from that reporting adjustment when judging the underlying trend.

Shouldn't GM's $20 billion buyback be good news for the stock?

Buybacks are generally a positive signal because they reduce share count and lift per-share metrics. But when they coincide with renewed doubts about future earnings growth, as happened here, the market tends to weight the guidance and cost outlook more heavily than the capital-return announcement, which can mute or even offset the buyback's usual positive effect.

Sources

This article is an original synthesis and analysis based on the reporting below, not a reproduction of the original articles. Please check the source articles directly for the most current figures.

⚠️ This article is for informational purposes only and is not investment advice. Market conditions change constantly - always verify the latest data before making investment decisions.