Definition
Companies report revenue, EPS, margins and guidance every quarter. Prices often move sharply on the release because it updates what investors know. The report is often followed by a conference call with analyst questions.
How it is used
Quick read: did EPS beat, is revenue growth speeding up or slowing, what does guidance say, and are margins rising or falling.
Watch out for
A good headline can come with weak guidance, and the reverse. The price reaction depends on expectations, not just the numbers.