US K-Shaped Economy: The American Version

The k-shaped economy has an American version, and it is the specific subject of Marc Chaikin’s new 401(ai) presentation: the US market splitting, company by company, into those whose economics AI improves and those it disrupts. We put together this account of the American shape of the argument, since the pitch is aimed squarely at US retirement savers. Our full 401(ai) teardown covers the presentation end to end.

The American Evidence

The divergences the pitch cites are US market history:

  • AppLovin (APP) versus WPP: the US ad-technology company that was not in the S&P 500 during its biggest run, versus the global agency incumbent
  • Palantir (PLTR) versus Gartner: US AI-native software versus the US research incumbent
  • Abercrombie & Fitch versus Tillys: two US specialty retailers, opposite arms, with the divergence credited to data-driven operations
  • Vertiv (VRT), Lumentum (LITE), Micron, Applied Materials: the US infrastructure buildout names whose runs the pitch’s Power Gauge rating dates document, Vertiv up more than 727% after April 2023, Lumentum up as much as 753% after August 2025

Behind the pairs sits the acceleration data: the AWS “Engines of Growth” study, real and matching the transcript nearly verbatim, found AI-native startups, most of them American, reaching billion-dollar valuations in about 3.5 years with 156% average annual revenue growth. Chaikin’s reading of what that speed means for the US: “If AI is creating the same kind of separation we saw during the internet, that separation may happen much faster this time. Which means you can fall behind faster.”

The 401(k) Layer

The American version of the frame lands hardest on the country’s default retirement vehicle. The pitch’s line: “The 401(k) was built for the economy of 1978… That economy is gone. It’s toast.” The argument is the index-fund lateness problem: the S&P 500 adds companies after their runs, AppLovin being the pitch’s example, so a 401(k) indexed to it structurally arrives late to the rising arm.

What earns the presentation credibility is the fairness note: “That’s not a flaw in the fund, Tom. I want to be fair here. That’s the fund doing exactly what it was built to do… And for 40 years, waiting was the smartest advice in America. I actually gave it myself.” The honest version of the argument is not that index funds are broken; it is that they are built for average outcomes in an economy producing divergent ones.

The Response the Pitch Sells

The 401(ai) answer is a five-stock model portfolio built for the rising arm, “the companies that I believe give you the clearest way to keep a portion of your money focused on the upper arm of the K,” plus a five-stock sell report for the falling arm and an eight-company waiting room of names needing “more evidence.” The design logic, per Chaikin: “I don’t want somebody who’s already nervous about retirement trying to choose among 40 different stocks across five different AI sectors. That’s how people end up doing nothing.”

The value anchor is over $2,000 with the price behind the click, a 30-day refund, and the candor we look for: a volunteered losing example, “the Power Gauge is not a crystal ball,” and an in-presentation disclaimer on the hypothetical basket’s 137% figure, “These results are not typical nor indicative of future performance.”

The Waiting Room Discipline

The offer’s least standard piece is the “401(ai) Waiting Room”: eight companies Chaikin says “deserve a place on the radar, but I want more evidence,” each with the specific missing signal that would earn a promotion into the portfolio. A system that publishes its maybe-list, along with the criteria for the yes, invites you to check its work later, which is a posture of confidence rather than urgency.

The same discipline runs through the sell side. The “Five Stocks to Sell Now” report profiles its names with the same specificity the portfolio gets: “why it concerns me, what the power gauge is seeing and what would have to change before I’d reconsider.” And the pitch’s philosophy of exits avoids the usual bluntness: “that doesn’t mean that they blindly sell because Marc Chaikin says so. That’s not how I want anybody to make investment decisions.”

The Honest Read

The US k-shaped economy is a real description of the current market: the pairs are real, the acceleration data is real, and the index-fund lateness problem is a genuine structural fact of capitalization-weighted indexing. What is interpretive is the response: that a five-stock portfolio of Power Gauge-bullish names reliably captures the rising arm, which is forward-tested by nobody yet, and that the 20-factor system calls the arms early, which is argued through after-the-fact winners.

For the frame’s full mechanics, see our full 401(ai) teardown and the Power Gauge explainer. For this publisher’s track record, our American Atlas review covers the September campaign. The American shape of this economy is divergence. Reading which companies sit on which arm is the whole job, and it is ours. For the plain-terms version of what the K means for a portfolio, see our K-shaped economy meaning piece.

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