Stock Market

That's when people come back from their bathroom break.

Seriously, the stock market changes all the time...every second that it is open. If your computer system shows YOU price changes at 2 pm then that could be the stock market reporting software the news feed provides to you.

However, there's some possibility that the stock market circuit breakers kick in or institutional trading traffic session occurs (at 2pm ET?).

It's mostly the time when shorts* cover their stocks. They are the ones
who manipulate the market every day. Actually, they're trying to regulate
that in Europe now that day traders and "shorts" are more more restricted.
I wish they'd do the same here.

*) Shorts = people who are short selling stocks
http://www.investopedia.com/university/shortselling/shortselling1.asp

Actually i have noticed same thing and i am also looking for same..so hope will get proper ans from this thread.