Is the stock market phony?

Everyday at 3:30pm it seems like the market turns upward almost like clockwork. No matter what the news - it doesn't matter. Experts say all kinds of funky explanations for this but this simply never used to happen with such regularity. Is this some kind of manipulation going on or what is it? This seems to be especially true on down days where at 3:30 it reverses course and closes up. On up days it becomes an almost parabolic climb on those days starting at again 3:30pm. It's so noticeable that they have even been commenting on it or laughing about it likes its some kind of inside joke on CNBC but nobody really wants to explain it. What is up?