But investors aren't all on board: Some Wall Street analysts remain bearish on the stock. Morgan Stanley analysts, for example, rate PLUG stock as a sell with a price target of just $0.75 -- roughly 50% below the current share price.

U.S. stock indexes ended mixed after Nvidia, Palantir and other superstar stocks pared most of their steep losses from the morning.

IPO wasn’t just huge; it effectively torched the playbook. A massive 50% first-day pop in the current stock market was remarkable, and in many ways, it has supercharged the IPO market. That kind of breakout rarely goes unnoticed,

The week’s biggest news for Wall Street is likely arriving on Friday, when Federal Reserve Chair Jerome Powell will give a highly anticipated speech in Jackson Hole, Wyoming. The setting has been home to big policy announcements from the Fed in the past, and the hope on Wall Street is that Powell will hint that an interest rate cut is coming soon.

XPeng stock rose Tuesday after the Chinese electric-vehicle maker reported better-than-expected second-quarter results. Tuesday morning, XPeng announced a second-quarter per-share loss of four cents from sales of just under $2.

The one reason Wall Street has been obsessed with TSMC's stock, which has more than doubled the S&P 500 index's returns this year (through Aug. 15), is because of the stronghold it has on producing artificial intelligence (AI)-related chips.

The S&P 500 slipped 0.4% and is on track for a third straight modest loss after setting its all-time high last week. The Dow Jones Industrial Average was up 8 points, or less than 0.1%, as of 11:50 a.m. Eastern time, and the Nasdaq composite was down 1%.