"Today is not just another day," says Peter Tuchman on the government shutdown. He's surprised markets didn't move lower in premarket hours but points to several bullish catalysts to explain why. Among them: institutional money on the sidelines and the start of an interest rate cutting cycle. As for the A.I. trade, the Einstein of Wall Street says the math checks out for the narrative to continue. He points to mega cap capex spending and Nvidia's (NVDA) "undervalued" angle he sees driving momentum.