Why Rising Rates Alone Rarely Kill a Bull Market
The Fed Model has turned bearish, but history suggests rate-driven bear markets are far from inevitable.
One of Wall Street's most referenced valuation frameworks, the so-called Fed Model, has flipped to a bearish signal — prompting fresh debate about whether equities are genuinely overvalued relative to bonds. The model compares the earnings yield on stocks to the yield on Treasury bonds, and when bond yields rise high enough to eclipse what stocks offer in earnings, the framework suggests investors should prefer fixed income. By that measure, the current rate environment has made stocks look expensive. But the question worth asking is whether that signal has ever reliably predicted the end of a bull market.
The historical record is more ambiguous than the model's reputation implies. There have been extended periods in which the Fed Model remained in bearish territory while equities continued to climb — sometimes for years. Rate environments do alter the calculus for investors, particularly in sectors sensitive to borrowing costs, but the relationship between rising yields and broad market declines is neither automatic nor linear. Corporate earnings growth, consumer resilience, and momentum can all override the gravitational pull that higher rates are theoretically supposed to exert.
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What the Fed Model is genuinely useful for is as a temperature reading on relative value — not as a precise market-timing tool. When bond yields are competitive with equity earnings yields, marginal capital may rotate toward fixed income, creating headwinds rather than outright reversals. That distinction matters enormously for how investors should interpret the current signal: a headwind is not a cliff edge, and conflating the two can lead to premature repositioning that costs returns.
The broader analytical point is that bear markets typically require a confluence of forces — a credit event, a recession, a demand shock — rather than elevated rates acting in isolation. The Fed Model can illuminate stretched valuations, but it lacks the predictive precision its adherents sometimes claim. Investors who have exited bull markets every time the model turned negative have, on balance, left significant upside on the table. That doesn't make the current signal irrelevant, but it does counsel against treating it as a mandate to de-risk entirely.
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