Stocks turned mostly higher Tuesday after trading lower earlier in the session on pressure from Russia’s move to update its nuclear doctrine, meaning it has lowered the threshold for using nuclear weapons.

Nvidia stock falls ahead of the AI chip maker’s quarterly earnings later this week, while Super Micro Computer is expected Monday to submit a plan to allow it to continue to trade on the Nasdaq.

The company still faces many unknowns, but an analyst expects Nasdaq approval for Super Micro’s filing plan in two to five weeks.