The stock market may be just one bad day away from forcing Washington and Wall Street to act. That’s the message Bank of America chief investment strategist Michael Harnett sent to clients on Friday, and investors listened.
In his weekly Flu Show note to clients, Hartnett warned that a dip in the S&P 500 below 6,600, just 1% below Thursday’s close, would be enough to trigger what he called a “war/oil/Fed/tariff policy response” to short-circuit core cent risks.
In clear circumstances, policymakers will be forced to step up.
The S&P 500 is down about 2.8% so far in 2026 and is about 5% from its peak. But the combination of rising oil prices and the escalation of the Iran conflict has left the market on edge.
Hartnett identified four specific market levels that, if violated, would force some type of intervention. Think of them as “travel wires.”
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S&P 500 below 6,600: A drop here would signal broader market pressure and likely prompt a response from the White House or the Fed.
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Oil above $100 per barrel: Investing.com reported that Brent crude was already trading at just over $100 on Friday, March 13. Hartnett recommends this level of fat.
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Dollar Index Above 100: The DXY traded around 100.3 on Friday, its highest since November, reducing global liquidity.
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30-year Treasury yield above 5%: The long bond yielded 4.9% on Friday. Hartnett recommends buying Treasuries if yields breach this level.
Three of those four trip wires are already at or within inches of their limits. The only one that hasn’t been created yet is the S&P 500 itself.
Hartett outlined what intervention might look like if markets were to deteriorate. Options are not open. Each has a clear mechanism and a clear beneficiary.
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Tariff Exemption: The White House’s withdrawal or suspension of certain trade products would immediately reduce inflationary pressures and lift risk assets.
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Reducing the Iran War: A ceasefire or diplomatic breakthrough would bring oil prices down sharply and restore confidence in global supply chains.
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Fed rate cuts or bond purchases: A Fed rate cut or a resumption of asset purchases would inject liquidity and provide a straight floor under the markets. Hartnett noted that the odds of a June rate cut have already dropped from a 100% probability to just 25% as oil tightens fiscal conditions.
One of the most useful parts of Hartnett’s note is his breakdown of where the crowd is, and where the value might be after the dust settles.
