Why Falling Stocks and Rising Bond Yields Are a Red Flag for Markets

  Is the Moody’s U.S. Downgrade a Red Flag or Not?   Why Falling Stocks and Rising Bond Yields Are a Red Flag for Markets...

Is the Moody’s U.S. Downgrade a Red Flag or Not?

Why Falling Stocks and Rising Bond Yields Are a Red Flag for Markets

Under different circumstances, Moody’s downgrade of U.S. sovereign debt might have been shrugged off. But this time, it triggered a sell-off in U.S. bonds, stocks, and the dollar as the new week opened. It’s a textbook case of the adage: “It’s not the news, it’s the market’s reaction to it that matters.”

The market had been pricing in optimism—higher stocks, a firm dollar, and demand for bonds. The downgrade caught that mood off guard.

Was Moody’s downgrade the trigger? Or did it merely highlight deeper vulnerabilities—such as ballooning U.S. fiscal deficits and rising uncertainty around tariffs and governance?

A Brief History of U.S. Sovereign Debt Downgrades

S&P Downgrade – August 5, 2011 • Downgraded U.S. debt from AAA to AA+ • Triggered by debt ceiling standoff and long-term fiscal risks • First-ever downgrade of U.S. sovereign debt • Market reaction: Stocks fell; U.S. Treasuries rose due to safe-haven demand

Fitch Downgrade – August 1, 2023 • Downgraded from AAA to AA+ • Motivated by political dysfunction, rising deficits, and governance concerns • Increased market volatility • Fed and Treasury officials rejected Fitch’s reasoning

Moody’s Downgrade – May 18, 2025 • Downgraded from Aaa to Aa1 • Cited rising deficits, political gridlock, and risk from extending the 2017 tax cuts • Aligns Moody’s with earlier downgrades by Fitch and S&P

Why This Is a Bad Mix for Markets

Rising bond yields, falling stocks, and a weakening dollar are a concerning trio. They signal a potential flight from U.S. assets. This echoes the market’s reaction after Trump’s “Liberation Day” tariff shock, which triggered a similar panic and raised alarms in the White House, leading to a 90-day pause in implementing reciprocal tariff rates. One difference here is the sell-off was not self-induced but a reaction to a third party action (i.e. downgrade).

Bad mix: Bonds d0wn (yields up), stocks down, dollar down (EURUSD up) – CFD feed

US  1 HOUR 10 YEAR = high yield) – May 19

US500 (SP500)  1 HOUR – May 19

EURUSD 1 HOUR – May 19

What Do Rising Bond Yields Mean?

Bond yields tend to rise when: • Interest rate expectations increase, In this case, it is not clear what path the Fed will take given its forecasts of weaker employment and higher inflation due to the impact of tariffs. While there is little chance of a Fed rate hike, debate is how many rate cuts it will make given the uncertainty over the impact of tariffs, especially on inflation • Government borrowing continues to increase, expanding supply of bonds • Investors demand higher returns for holding riskier debt • Higher yields push up borrowing costs for consumers and corporations alike

In this case, the Moody’s downgrade reminded markets of fiscal vulnerabilities, pushing yields higher.

What Do Falling Stocks Signal?

Stock declines usually suggest: • Concerns about future corporate earnings or economic outlook • Recession risk or uncertainty over the Fed’s policy direction • A shift in investor sentiment away from risk assets

Why Is It a Dangerous Combination?:

When both bonds and stocks fall

:• Stagflation fears grow (slow growth + high inflation) • Monetary policy error risks increase: The risk of a policy error by the Fed is greater than normal depending on what side of its mandate (stable prices and maximum employment) it eventually responds to.. • No safe haven: Normally, bonds rise when stocks fall. If both drop and the dollar weakens too it reflects a loss of confidence across the board

For Traders and Investors: What to Watch

• For forex traders: If U.S. bonds and stocks fall together, it’s often a bearish signal for the dollar • For investors: Monitor the correlation. A parallel drop in bonds and equities is a market red flag

Moody’s downgrade may not have told us anything new but the market’s reaction did. It exposed fragile confidence in the U.S. economy, driven by fiscal concerns, tariff policy uncertainty, and global headwinds.

While the current move could be a one-off, the combination of rising yields and falling stocks is worth watching closely. It may not signal crisis yet, but it’s certainly flashing yellow.

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