BCA: The Biggest Risk for the S&P 500 Lies in Excessively High Profit Margins
nashnova research
BCA chief economist Peter Berezin warns that S&P 500 profit margins sit roughly 4 percentage points above 2019 levels — an anomaly propped up by the AI capex boom, and the market's most underappreciated risk.
The P/E looks reasonable — so where's the problem?
The S&P 500 trades at roughly 20× forward earnings, a figure that looks fair on the surface.
But Berezin argues the denominator — corporate profits — is itself abnormally inflated. Current margins run about 4 percentage points above 2019.
This means → a "reasonable" P/E is built on "unreasonable" margins. If margins revert, today's stock prices suddenly look expensive at the same earnings multiple.
Why are margins so elevated?
Berezin traces the root cause to the AI capex boom, which triggered a chip-supply shortage.
The shortage boosted chipmakers' pricing power directly — classic supply-demand dynamics.
At the same time, cloud providers capitalised their massive spending — spreading one-time outlays across future years on the income statement. In plain terms = reported profits look healthy, but actual cash flow is tighter than the financials suggest.
When does this unwind?
Once the chip-supply shortage eases, margins face downward pressure, and earnings growth could systematically undershoot consensus.
Berezin adds a critical timing point: the market inflection will not wait for the shortage to fully end. It will arrive the moment investors perceive early signs of relief.
This means → the risk window may open before fundamentals actually deteriorate — by the time margins visibly decline, the price adjustment may already be over.
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