30-year U.S. Treasury bonds failed to hold the 5% "life and death line"! Bank of America's Hartnett: "The gates of hell" have opened, and early June is the "sell window"

U.S. Treasury yields break through 5%, and the U.S. stock market hits new highs simultaneously. Bank of America’s Chief Investment Strategist Michael Hartnett issues a warning: asset boom cycles often end when yields rise rapidly, combined with market funds flocking into stocks and rising inflation risks. Early June will be a window for profit-taking.

According to the Wind Trading Platform, Hartnett stated in his latest report that the 30-year U.S. Treasury yield reached 5.11%, surpassing the critical 5% threshold and approaching a multi-year resistance level, which could trigger a historic risk value shock, causing yields to spike sharply in the short term. Historically, bubbles tend to burst alongside rapid yield increases; once the 5% line is seriously breached, the gates to doom will open.

Meanwhile, in the weekly Flow Show, Hartnett wrote that “bullish chasing of stocks and tech stocks may fully unwind in the coming weeks, and early June is an opportune time to reduce positions.” He pointed out that a series of key events will occur in June, including the seventh OPEC meeting, the World Cup opening, the G7 summit, and the first Federal Reserve FOMC meeting chaired by Kevin Warsh. These events could all trigger market caution.

Inflation data provides direct support for this warning. U.S. April PPI year-over-year rose to 6%, the fastest pace since 2022; CPI year-over-year increased to 3.8%, exceeding economists’ expectations. Hartnett’s team estimates that if the recent six-month average monthly increase of 0.4% in core CPI does not slow down quickly, U.S. CPI will break 5% before the mid-term elections in November. This outlook puts significant pressure on the stock market.

U.S. Treasury “Maginot Line” has been breached

Hartnett previously warned that if the 30-year U.S. Treasury yield “completely breaches the 5% level,” it would be the “opening of the gates to the end of days.” Now, that gate has been knocked open — last Friday, the 30-year yield closed at 5.11%, 11 basis points above the warning line, and is breaking through multiple technical resistance levels since 2023. Once confirmed as a valid breakout, long-term rates could surge several standard deviations in a single day, triggering a large-scale deleveraging wave. The long-term upward trendline of the 10-year Treasury yield has also officially broken.

History repeatedly confirms that the end of bubbles is always accompanied by sharp rises in yields: in 1989, Japanese government bond yields rose 230 basis points; in 1999, U.S. Treasury yields jumped 260 basis points. Today, the Nasdaq and the 10-year yield are both experiencing annualized large increases, forming a “notable echo” of the cycles in 1989 and 1999.

Inflation Warning Line: CPI breaking 4% is a “Dragon’s Domain” for risk assets

Hartnett defines CPI surpassing 4% as the critical point where risk assets begin to “become restless.”

He cites historical data from the past 100 years, indicating that once inflation crosses this threshold, the S&P 500 index tends to decline an average of 4% over the next three months, and 7% over six months.

Current inflation pressures are broad-based, covering energy, electricity, transportation, commodity prices, and rents. Rising inflation expectations have pushed the 10-year U.S. Treasury yield above 4.5%, and the 30-year Treasury yield has crossed 5% — Hartnett previously called this level the “Maginot Line.”

Bank of America’s team forecasts that if the monthly sequential increase remains at 0.4%, CPI will reach 5.2% by the end of the year; even if the pace slows to 0.3%, CPI will still rise to 4.4%, both well above the Fed’s 2% target.

Bullish sentiment approaching extremes, multiple indicators issue warnings

The Bank of America Bull & Bear Indicator rose from 7.2 to 7.6 this week, approaching the “sell signal” trigger line at 8.0.

Hartnett’s team notes that if, in the next two weeks, global equity fund inflows reach $15-20 billion, with emerging market bonds and high-yield bonds each receiving about $2 billion, and if the May fund manager survey shows cash holdings dropping from 4.3% to 3.8%, this indicator will trigger a sell signal within two weeks.

Position data from private clients also confirms extreme market optimism. Bank of America’s private client assets total $4.5 trillion, with stock allocations rising to 65.7%, a record high; cash holdings have fallen to 9.8%, also a historic low. Since the March 30 lows, the S&P 500 has rebounded 18%, and the Nasdaq 100 surged 29%, driven by the AI boom pushing semiconductors and related stocks to new highs.

The Semiconductor Index SOX currently deviates from its 200-day moving average by as much as 62%, which Hartnett compares to extreme cases like the Mississippi Bubble and the Dot-com Bubble — at bubble peaks, the average deviation was only about 35%.

Stocks and bonds are both attracting capital

Latest weekly fund flow data shows $28.1 billion flowing into bonds, $20.5 billion into stocks, $5.8 billion into cash, $2 billion into gold, and $1.3 billion out of cryptocurrencies — the largest weekly outflow since February 2026.

By market segment, U.S. large-cap stocks saw inflows of $24.4 billion in the week, the largest in nearly five weeks; tech stocks attracted $5.4 billion, the biggest in three months; infrastructure funds saw a record weekly inflow of $1.5 billion.

Investment-grade bonds have seen a total inflow of $42.2 billion over the past four weeks, the largest since March 2026; Treasuries have been flowing in for three consecutive weeks, with a weekly inflow of $5.6 billion, the largest in nearly six weeks.

New Fed Chair’s appointment and political risks add extra variables

Hartnett’s team also notes that historically, new Fed chairs see Treasury yields rise about 50 basis points within three months of taking office. If this pattern repeats with Kevin Warsh, the 2-year Treasury yield could rise to 4.53%, and the 10-year yield to 4.93%.

On the political front, Hartnett cites UK local election data showing that support for reformist and Green parties surged from 3% to 41%, while Labour and Conservative support dropped sharply from 92% to 54%.

He believes that extreme politics and Wall Street’s extreme price movements are echoing each other, and that inflation eroding living standards is the fastest way for ruling parties to lose voter support — Trump’s support on inflation has fallen to 30%, near Biden-era lows. Hartnett warns that this slow-burning fuse could trigger a large asset rotation from chips and commodities into consumer sectors by 2027.

All the above insights are from Wind Trading Platform.

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