I don't believe in buy signals. You never know whether any particular level is the bottom. But that doesn't mean the opportunity is the same when the market is

I don't believe in buy signals. You never know whether any particular level is the bottom. But that doesn't mean the opportunity is the same when the market is down 5%, 20%, 40% and 60% respectively. Of course a massive crash is a greater opportunity than a small correction regardless of how much further prices fall. But the real question is whether it makes sense to keep cash on the side in order to wait for one of these relatively rare crashes. The answer is probably no.