The U.S. Commerce Department reportedly is considering tightening its restrictions on chip exports to China.

Three companies have their proverbial foot in the AI door. Their gains, up until the end of May, were spectacular.

After U.S. markets close on Wednesday or before they open on Thursday, these three firms will report quarterly results.

Tuesday's top analyst upgrades and downgrades included Advance Auto Parts, Alphabet, Biogen, Cheesecake Factory, Chesapeake Energy, Micron Technology, MongoDB, Ross Stores, Tesla and TG Therapeutics.

This week, Micron Technology is among companies expected to lift the dividends they pay to shareholders, showing that they are doing well and have the earnings and cash flow strength to increase their payouts.

Electric pickup truck maker Lordstown Motors has filed for bankruptcy protection and commenced a lawsuit against its erstwhile partner Foxconn .

Consumer staples giant General Foods will report quarterly earnings before U.S. markets open on Wednesday.

Monday's top analyst upgrades and downgrades included Academy Sports and Outdoors, Accenture, Clorox, Fiserv, Moderna, Planet Fitness, Sarepta Therapeutics, Tesla, Under Armour, Ventas, Viatris, Wayfair and Welltower.

For aggressive growth investors with ample risk tolerance and a long-term horizon, these five Cathie Woods ARK Innovation ETF holdings are almost guaranteed winners now and could provide some huge gains in the coming years.

The aborted rebellion in Russia is, so far, having a minimal effect on U.S. markets.