Why? unless they have insider information they are only guessing. That's kind of like saying the guy next to me at the roulette table keeps winning betting red so I will bet red.

Some investment companies will create 10 different mutual funds where the odds are that at least one of them will be successful. And, that is the one that they will market to their customers. I have always invested in index funds instead of funds managed by stock pickers.

I have several mutual funds, stay with those that have a good long term track record. Long term do a bit better than their pier groups. If they do not perform over some period of time we say bye and go on to another.