MMs are required to cover their shorts by the end of the month, so they move the price downward to buy-to-cover low.
The same short covering requirement deadline is the 15th of the month, so you'll see the usual dip then, too.
I expect to see some price fireworks beginning of July.
New long-term bull market from Oct. 16, 2008 (+6 months for
underbubble overreaction) to Feb. 5, 2018 (+6 months for overbubble
overreaction). Dow tops out at about 26,500 resistance, then goes generally down for ~9 years. IMHO.