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The Stock Market Is Undergoing a Regime Change

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With the summer rally from the June lows, I previously thought the bear market was over. I had based my optimism on my observations of past bear markets; historically, once they recover over 50% from lows, they usually don't go back below said lows. It turns out that I was wrong. Even though the summer rally erased more than 50% of the bear market, the S&P 500 has now gone back and is re-testing the June lows and might break down further.


This is because the U.S. Federal Reserve has been much more aggressive in its policy tightening as inflation has spiralled out of control. The following chart of the S&P 500 is from the start of the Covid bear market (Feb. 18, 2020) to the writing of this article (Sept. 24, 2022).

The Stock Market Is Undergoing a Regime Change
The Stock Market Is Undergoing a Regime Change
The Stock Market Is Undergoing a Regime Change
The Stock Market Is Undergoing a Regime Change

Stocks depend on bonds

There has been a regime change in the market brought about by the Federal Reserve. As can be seen in the chart below, for the last 40 years, 10-year treasury yields (the black line) have been falling as one of the many side effects of interest rates being steadily lowered over this period. That means the prices of bonds have risen for four decades. As bond yields fall, the price of bonds goes up, and vice versa. Now this has reversed. This is a very big deal since in the U.S. alone, bond markets make up almost $40 trillion in value, compared to less than $20 trillion for the domestic stock market. The bond market is the dog which wags the stock market tail; American stock prices have been built on the assumption of an ever-growing bond market.

Alarmed by high inflation which is now at forty year highs (represented by the blue line in the chart below), the U.S. Federal Reserve has now embarked on a rapid tightening process. It is not only increasing its overnight lending rate (called the effective Federal Fund rate), but it is now selling its hoard of longer term bonds it had accumulated in the last decade in order to drive up longer term interest rates like the 10-year Treasury bond interest rates (black line). The latter intervention on the long end of the bond curve is called "Quantitative Tightening," or QT, and is the reverse of Quantitative Easing, which was the norm for the past decade. Now it's clear to me that the four decades long bond bull market is over. The black line has clearly broken out of the four decade downward trend.

The Stock Market Is Undergoing a Regime Change
The Stock Market Is Undergoing a Regime Change

The following chart shows the S&P 500 (blue line) as well as the S&P 500 dividend yield (green), earnings yield (magenta) and the 10-year Treasury bond yield (black line).