Quote from Ghost of Cutten:
<15 times earnings (<12 times once cash is backed out) is not comparable to 50-100 times earnings. With identical business prospects, the former is a screaming buy and the latter is a screaming sell. And the whole point of crashes, bear markets, and such, is precisely that they do throw up excellent companies at attractive prices. You either get value at dirt cheap prices, or prime growth stocks selling like a run-of-the-mill value stock (AAPL at <10 times ex-cash forward earnings is a good example - even MSFT would be cheap at that price, and MSFT is ex-growth).
The current street sentiment to AAPL (and large cap tech in general) is one of extreme scepticism as to the sustainability of their earnings growth, the complete opposite of 2000. Otherwise, they'd be at 30-40 times earnings, like high growth stocks often trade at. Yet, the earnings have showed no signs of slowing, in fact they keep beating spectacularly, and the stock keeps outperforming the S&P (as it has done during this crash).
When street sentiment is one way, and market action and fundamental data points are the other, you go with the latter - on big size. Divergence between reality and sentiment is where the biggest opportunities lie.