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Stocks making the biggest moves midday: Under Armour, Tesla, Lyft, First Solar & more

Yun Li

Shares of Tesla rose more than 1% after lawmakers began to push to expand federal tax credits for buyers of electric vehicles. New York University professor Aswath Damodaran said Tuesday on CNBC that shares should be trading closer to $59 per share , cutting down $3 billion off the ride-sharing company's $18 billion valuation. First Solar FSLR — Shares of First Solar soared more than 8%, on pace for its best day of the year, after Goldman Sachs added the stock to its "Americas Conviction List," while reiterating its buy rating and raising the stock's price target to $75 from $64.