S&P 500 Hits All-Time High Valuation Warning: What Gary Gensler Sees

Former SEC Chair Gary Gensler dropped a quiet bombshell on Bloomberg this week: US equity markets are at historically high valuations across every metric he tracks, including price-to-earnings ratios, the Buffett indicator, and the Shiller index. His word for it was a 'possible market top.' That's not exactly the kind of thing that gets buried in the footnotes.

Meanwhile, the week's actual market action told a split story. Major indices finished modestly higher, with the S&P 500 up 0.4%, the Dow up 0.3%, and Nasdaq up 0.3% on volume running 32% below its 20-day average. Thin tape, mixed signals. The Iran ceasefire officially collapsing, oil tanker traffic through Hormuz slowing to a crawl, and the Fed flagging stepped-up inflation didn't exactly inspire a buying frenzy. Tom Lee over at Fundstrat is calling geopolitical pullbacks buying opportunities, citing the V-shaped recovery from the February-April escalation. He has a point. He also has a point that legacy defense primes have actually declined since the war started despite surging defense budgets, which is a rotation story worth watching.

Gensler's railroad-and-internet analogy for the AI boom is the uncomfortable thought experiment nobody on FinTwit wants to sit with: general-purpose technology cycles historically end with overinvestment, recessions, and a lot of very confident people holding very expensive bags.