It all depends on which stocks they own. And not all stocks go...

It all depends on which stocks they own. And not all stocks go down uniformly. If I need to cover a margin call then I might have to sell some GOR, for the simple reason that it has outperformed and I need to raise money within 24 hours (or however long it takes. Haven't bought stocks on margin for 15 years or so and I never did have a margin call).

The last thing investors need do is panic, particularly if you don't buy stocks on margin. Risk management and profit taking are factors that must be considered. Stocks fall for various reasons. Margin calls are but one - and the environment is clearly ripe.