Ali Mogharabi calls Nvidia (NVDA) a "very, very high quality company" that faces numerous headwinds. He wouldn't buy shares until there's more clarity on tariffs. Turning to other Mag 7 names, Ali notes Meta Platforms (META) as another company that will have to adjust its ad revenue stream. If it lowers prices, higher volume in its user base can offset profit losses. He would consider buying Microsoft (MSFT) on a dip.