Here are the biggest calls on Wall Street on Tuesday: Goldman Sachs initiates MediaAlpha as buy Goldman says it's bullish on shares of the ad tech platform company. "We are initiating coverage of MediaAlpha (MAX) with a Buy rating and a $20 12-month PT." Morgan Stanley reiterates Nvidia as overweight Morgan Stanley says it's standing by shares of the stock.

"We believe NVIDIA's upcoming earnings will dispel concern and drive share price rebounds for the overall AI supply chain." Goldman Sachs upgrades Santander Chile to neutral from sell Goldman says it's getting more constructive on shares of the LatAm bank. "We upgrade Santander Chile to Neutral, as we see strong earnings momentum at the bank in the medium term, where we expect EPS to grow 24% on average in 2023-2026E and profitability rebounding after decreasing sharply in 2023.

" Barclays initiates LatAm Airlines as overweight Barclays says it's bullish on shares of the LatAm airlines company. "After a transformational restructuring process, LATAM Airlines is well positioned to profit from a supportive market environment. Its extensive network, lean cost structure, and strong balance sheet should drive sustainable results.

" UBS reiterates Exxon as buy The firm says it Exxon is a top idea, but that it likes Chevron also. "We reiterate our Buy rating on both XOM and CVX post the 2Q updates. We continue to see both as well positioned for the current cycle with visible Upstream growth outlooks, Downstream capacity additions, b.