Stocks making the biggest moves midday: Tesla, First Republic, KeyCorp, UBS and more

Check retired the companies making headlines successful midday trading Tuesday.

Tesla — Shares popped 5% aft Moody's upgraded Tesla to Baa3 standing from its junk-rated credit. Moody's called the electric-vehicle shaper the "foremost manufacturers of artillery electrical vehicles" and said the upgrade reflects Tesla's prudent fiscal argumentation and management's operational way record.

First Republic, KeyCorp, U.S. Bancorp — Regional slope stocks rebounded connected Tuesday arsenic Treasury Secretary Janet Yellen said the authorities would see backstopping deposits astatine much banks successful bid to support the fiscal system. Shares of First Republic jumped much than 41%, portion KeyCorp added 9%. U.S. Bancorp roseate astir 8%.

JPMorgan, Bank of America — Shares of larger U.S. banks roseate connected Tuesday arsenic investors showed accrued optimism aft Yellen's remarks. JPMorgan gained astir 3% and Bank of America roseate by 3.5%. 

Foot Locker — Foot Locker gained 6% aft Citi upgraded the retail stock to a bargain from neutral aft its capitalist time connected Monday. The steadfast said the company's determination distant from malls and toward digital, kids and loyalty projects is simply a measurement successful the close direction.

Harley-Davidson — Shares of Harley-Davidson roseate much than 5% aft Morgan Stanley upgraded the motorcycle maker and said its absorption connected its halfway concern tin assistance the banal by much than 30%. Jefferies besides upgraded the stock, saying the company's hazard and reward are much balanced aft a caller decline.

UBS — U.S.-listed shares of the Swiss-based slope gained 12% during midday trading pursuing its statement implicit the play to bargain Credit Suisse for $3.2 billion. Credit Suisse roseate 5% aft taking a astir 53% plunge connected Monday.

Roblox — Shares roseate much than 3% aft D.A. Davidson said the online crippled level has an "underappreciated" opportunity successful artificial intelligence.

Emerson Electric — Shares added astir 2% aft Morgan Stanley said shares of the multinational tech institution are too charismatic to ignore. The steadfast upgraded the banal to overweight from adjacent weight.

Exxon Mobil — The lipid and state giant's banal terms gained 3% aft Morgan Stanley said it likes the company's robust "competitive positioning."

— CNBC's Alex Harring, Jesse Pound, Tanaya Macheel and Michelle Fox Theobald contributed reporting.