HIGHER: Tesla (TSLA), up 2% after Canaccord upgraded the stock to Buy from Hold with analyst Jed Dorsheimer stating that he thinks electric vehicle, or EV, penetration is underappreciated by Wall Street. He believes the last two quarters and recent guidance have removed significant concerns for both production capability and profitability of the Model 3... Avis Budget (CAR), up 7% after Goldman Sachs analyst David Tamberrino double upgraded shares to Buy from Sell and raised his price target to $35 from $30. Trading at 6.2 times estimated 2019 EBITDA versus a historical trough multiple of 5.9 times and long-term average 8.4 times, shares of Avis look attractive for mean reversion, Tamberrino tells investors in a research note... NuVasive (NUVA), up 15% after a Financial Times report claiming that Smith & Nephew (SNN) has held talks to acquire the company. UP AFTER EARNINGS: Restaurant Brands (QSR), up 4%. DOWN AFTER EARNINGS: Avaya (AVYA), down 7.5%. LOWER: Nvidia (NVDA), down 2% after Bernstein analyst Stacy Rasgon downgraded shares to Market Perform from Outperform following the company's "somewhat chilly guidance cut," which appears much more fundamentally demand-driven, with the question of the "true" run-rate of the gaming business remaining up in the air for now... CommVault Systems (CVLT), down 4% after Piper Jaffray analyst Andrew Nowinski downgraded the stock to Neutral and lowered his price target for the shares to $66 from $71... Bed Bath & Beyond (BBBY), down 2% after Loop Capital analyst Anthony Chukumba downgraded the stock to Sell and lowered his price target for the shares to $12 from $13. The recent rally in the shares is unwarranted as management's "much better-than-expected" fiscal 2019 financial guidance is "unrealistic," Chukumba tells investors... Smith & Nephew, down 5% after the Financial Times' report about talks to potentially buy NuVasive.