I've posted this quote before, but was reminded of it recently and since it is probably especially relevant today, I thought it was worth posting again.
“If you buy a cheap stock when the market is high, it is a challenge because, if the market being high is followed by a general decline in prices, then for you to make money in your cheap stock, you have to swim against the tide. If you buy when the market is low, and that lowness is going to be corrected by a general inflation, and you buy your cheap stock, then you have the tailwind in your favor….I think it is unrealistic and maybe hubristic to say, “I don’t care about what is going on in the world. I know a cheap stock when I see one.” If you don’t follow the pendulum and understand the cycle, then that implies that you always invest as much money as aggressively. That doesn’t make any sense to me. I have been around too long to think that a good investment is always equally good all the time regardless of the climate.” –Howard Marks