Netflix shares rose 13% today after a the market took yesterday off due to the July 4 holiday, closing at $81.72 thanks to the company’s biggest single-day gain since late January. The surge comes a couple of days after CEO Reed Hastings said in a Facebook entry that Netflix’s monthly viewing eclipsed 1 billion hours in June, which BTIG analyst Rich Greenfield calculated would have made Netflix ”the 7th most watched network inclusive of broadcast and cable networks (up from No.