Remember Theranos?

The blood-testing unicorn that promised to diagnose 200 diseases from a finger prick, vaporized $9 billion in valuation, and sent its founder to federal prison?

Well, Wall Street just handed a $31 billion valuation to another blood-testing company.

Of course, this time, Natera (NTRA) actually has the trial data, the FDA filings, and a near-monopoly on detecting cancer recurrence before scans can.

Same pitch deck genre, different product.

Guess, sometimes, the later bird gets the worm.

— Brooks & Cas

What: Cerebras (CBRS) priced its IPO at $185 a share Wednesday, 48% above its initial range, then jumped 68% on its first day of trading. Its market cap after two days on a public exchange: roughly $67 billion.

Why: For a company aggressively angling for a slice of Nvidia’s (NVDA) pie, the chart is awkward. Nvidia is expected to post just under $73 billion in data-center revenue next week, growing 86% year-over-year. Cerebras grew 96%, to $171 million. That makes Nvidia's AI chip business more than 400x the size of Cerebras’ and barely slowing. CBRS now trades at 134x trailing revenue, 5x Nvidia's multiple.

What Else: Customer concentration is the load-bearing risk. 86% of Cerebras's 2025 revenue came from two UAE government-backed outfits, and only 15% of its $24.6 billion backlog converts over the next two years. Futurum's Shay Boloor says the market is "already pricing in years of flawless growth." Cyclical chip businesses rarely deliver flawless anything.

Watch: CBRS's first earnings print as a public company. Timing got Cerebras here. Execution looks like its best path forward.

What: President Trump wants rate cuts. He presumably picked newfound Federal Reserve Chair Kevin Warsh to deliver them. But the bond market is making that complicated.

Why: Where to begin? The 2-year Treasury spiked above 4% overnight Thursday, a fresh year-to-date high, while 20- and 30-year yields both sit above 5%. Consumer price inflation is running at 3.8%, nearly double the Fed's 2% target. The Strait of Hormuz remains blocked. Energy is now the primary inflation transmission belt, and 2-year notes are the market's vote on whether the Fed is keeping up.

What Else: Long-end tightening cuts both ways. With 20- and 30-year yields above 5%, financial conditions are tightening without any FOMC action, which is exactly the cover a dovish chair could use to justify a short-end cut. RSM's Joseph Brusuelas notes that rising breakeven inflation rates suggest Warsh "will have to prepare for the chance that inflation will continue to rise."

Watch: The next CPI print and the 2-year. Warsh testified that "inflation is a choice." The data is asking him to pick.

What: The SOX semiconductor index now trades 62% above its 200-day moving average, per Bank of America (BAC) strategist Michael Hartnett. That is more than double the Dow's spread before Black Monday 1987 and Black Tuesday 1929.

Why: The closer matches are uglier. The Nasdaq carried a 55% spread into the dot-com crash in 2000. The French CAC All Tradable hit 73% before the Mississippi Bubble burst in 1720, when colonial-company shares were briefly accepted as legal tender. Micron (MU), AMD (AMD), Marvell (MRVL), and Intel (INTC) have all gone parabolic since late March. Hartnett's read: "Here we go again."

But: The revenue side complicates the comparison. Alphabet's (GOOGL) Q1 cloud revenue grew 63% year-over-year. Amazon's (AMZN) AWS hit $37.59 billion, up 28%. Microsoft's (MSFT) Azure-inclusive cloud unit posted $34.68 billion, up 40%. Howard Marks, citing Derek Thompson, notes the railroads and broadband build-outs were also bubbles that "transformed America."

Watch: The SOX's distance from its 200-day and the S&P advance-decline line. Sometimes bubbles permanently push the envelope wider. Sometimes they pop.