Calling a low is almost as impossible as calling a high. Though there are methodologies like Graham's which provide decent net-nets to invest in. A study on the Graham stocks since 1990: http://www.netnethunter.com/benjamin-graham-is-this-where-mo...
So, it really depends on the methods used to find the bargain which matters.
The economy will recover, and you'll have bought a lot of value for a good discount.