Here are Friday's biggest calls on Wall Street: UBS reiterates Tesla as buy UBS said it's recent survey checks show Tesla is "best positioned" to win the EV race. Wells Fargo reiterates Microsoft as a top AI pick Wells said Microsoft is one of the biggest beneficiaries of AI. Jefferies downgrades UBS to hold from buy Jefferies said it sees too much uncertainty after the banking giant's acquisition of Credit Suisse. Jefferies upgrades Regeneron to buy from hold Jefferies said it's bullish on several of the pharmaceutical company's products. Citi reiterates Nvidia as buy Citi said Nvidia is a top beneficiary of AI.

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