[300bps]

Is -3% really a "hammering"

Doesn't sound like it when looking at the percentage. Apple had a market capitalization of $481,390,000,000 at the market close today. So 3% of that is $14,441,700,000. Seems more significant in whole numbers.

The real thing to consider is that every stock is much more thinly traded in after markets than it is during regular hours. For that reason, the few people trading during that time are typically not representative of the entire investment community.