Earnings Surprise

What is EPS Surprise?

The percentage difference between reported earnings and analyst expectations.

Think of it like this

Like a student getting a 95% on a test when everyone expected an 80% - the surprise matters as much as the grade.

Formula

Surprise % = (Actual EPS - Estimated EPS) ÷ |Estimated EPS| × 100
  • Actual EPS: Reported earnings per share
  • Estimated EPS: Average analyst estimate
  • Surprise: Positive = beat, Negative = miss

Why it matters

  • Stocks often move sharply on surprises
  • Consistent beats suggest management skill
  • Misses can trigger significant selling
  • Sets expectations for future guidance

What's a good value?

> 10%
Big Beat
Strongly exceeded expectations
2-10%
Beat
Modest outperformance
-2% to 2%
In Line
Met expectations
< -2%
Miss
Disappointed investors

Real-world example

A 15% earnings surprise often leads to stock jumps of 5-15% on earnings day.

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