Analyst Update: DISH Network Corp, Nevro Corp, and SINA Corp

Analysts are weighing in on cable service provider DISH Network Corp (NASDAQ:DISH), medical device company Nevro Corp (NYSE:NVRO), and tech stock SINA Corp (NASDAQ:SINA). Here's a quick roundup of today's brokerage notes on DISH, NVRO, and SINA.

• DISH is up 2.6% at $52.63, following an upgrade to "outperform" from "neutral" at Macquarie. The brokerage firm said DISH Network Corp could see benefits from an upcoming spectrum auction, and waxed optimistic about a potential merger scenario with telecom heavyweights T-Mobile US Inc (NASDAQ:TMUS) and Verizon Communications Inc. (NYSE:VZ). Today's positive price action is just more of the same, considering the stock has recovered more than 35% since hitting a two-year low of $38.85 in February, with recent pullbacks contained by its 80-day moving average. Before today, 10 of 12 analysts rated the stock a "hold" or worse, leaving plenty of room for further upgrades to propel DISH even higher.

• NVRO is the latest healthcare stock to make a big move, surging 15.4% to $93.43 -- fresh off a new all-time high of $94.53 -- after the company turned in a revenue beat and upwardly revised full-year forecast. No fewer than four brokerage firms raised their price targets, including Leerink. Specifically, the brokerage boosted its price target to $120 from $95, citing strong sales of the firm's Senza HF10 pain management system. The stock is currently up 81% year-over-year, and could find support going forward near $86, home to its previous highs. This latest move likely has short sellers kicking rocks. Short interest on the stock jumped 6.1% in the latest reporting period, and now accounts for 29.4% of NVRO's float, an amount that would take over two weeks of trading -- at Nevro Corp's average daily volume -- to cover.

• SINA is up 13.5% at $66.23 -- and earlier hit a two-year high of $66.65 -- after the firm's second-quarter earnings exceeded expectations. In wake of the earnings win, Brean raised SINA's price target to $65 from $55, and Jefferies boosted its price target to $67 from $64. SINA Corp now sits up almost 58% year-over-year, thanks in part to several recent bounces off its 80-day moving average. In the options pits, however, SINA's 10-day put/call volume ratio at the International Securities Exchange (ISE), Chicago Board Options Exchange (CBOE), and NASDAQ OMX PHLX (PHLX) of 1.99 is higher than 92% of all other annual readings, meaning puts have been bought to open over calls at a near-annual-high clip.