STOCKS TO WATCH The Hot Stock: Why’d It Have to Be Motorola Solutions?!?! Motorola Solutions was the best-performing stock in the S&P 500 today, though numbers two and three were more interesting. By Ben Levisohn Oct. 6, 2017 5:28 p.m. ET It couldn't beUnder Armour(UAA), which was the second-best performer in theS&P 500today with a 3% gain to $17.02, orGeneral Motors(GM), the third-best performer with a 2.5% rise to $44.93. No, the hot stock today, the one that finished atop theS&P 500, wasMotorola Solutions(MSI). ILLUSTRATION:NAM Y. HUH/ASSOCIATED PRESS It's not that we have anything against Motorola Solutions. Its stock gained 4% to $89.44 aftergetting upgraded to Buy from NeutralatCleveland Research, easily topping the S&P 500's 0.1% decline to 2549.33. According toBloomberg, Cleveland analystBen Bolinwrote that channel checks suggest that the company is growing faster than he had expected. He raise his third-quarter revenue growth estimate to 4%, above the 3.4% average of analysts polled byBloomberg. But let's face it: The other two are far more interesting. General Motors is getting a lift as investorsdebate whether it should be considered a tech stock. And Under Armour continues to tread water near its 52-week low that's still not too far away despite today's gain. Butnegative comments from analystshaven't been able to knock it lower either. But the hot stock? Today, that's Motorola Solutions. Enjoy the perch. http://www.barrons.com/articles/the-hot-stock-whyd-it-have-to-be-motorola-solutions-1507325306