Margin expansion or compression
📊 EarningsGross or operating margin moves materially versus prior quarters.
Typical size
3-12%
Timeframe
Immediate, with lasting effect on the multiple
Evidence
0 logged events
Why it moves the price
Margins determine how much revenue growth converts into profit. A durable margin change re-rates the entire earnings power of the business.
What separates a good call from a naive one
Investors pay up for margin expansion driven by mix or pricing power, and ignore expansion driven by one-off cost cuts. Compression from deliberate growth investment is treated far more kindly than compression from competition.
Measured impact
Every logged event is measured against real closing prices: the move from the close before the event, compared with the S&P 500 over the same window.
Next day
Not measured yet
After 1 week
Not measured yet
After 1 month
Not measured yet
No measured verdict yet — 0 events logged. Three or more are needed before the data says anything useful.
The evidence (0)
Every row is a real event, measured against actual closing prices.
Measured from historical closing prices. Past reactions do not guarantee future ones. Not financial advice.