For generations of investors, the decision to buy stocks instead of bonds was driven by a clear and comforting incentive known as the Equity Risk Premium. This metric acts as a margin of safety, representing the extra return an investor expects to earn by enduring the volatility of the stock market rather than settling for the quiet security of government debt. To some experts, including renowned economists, it is essentially the holy grail of investing because it reveals whether shares are truly a bargain or dangerously overpriced compared to risk free alternatives.
Historically, this cushion has been substantial. On average, since the late nineteenth century, stocks have offered a premium of around 3.5 percent over inflation adjusted bonds. During much of the last decade, this gap was even more pronounced due to exceptionally low interest rates. Between 2010 and 2022, investors enjoyed a lush environment where big cap stocks provided a massive advantage over treasuries, making equity investments look like an obvious win regardless of their price tags.
However, that comfortable era has come to an abrupt end. A combination of rising real interest rates and increasingly expensive stock valuations has caused the equity risk premium to collapse by roughly 77 percent. Today, the difference between what an investor earns from S&P 500 companies and what they could get from a safe ten year treasury note has dwindled to just under one percent. Essentially, riders on the stock market rollercoaster are being paid very little extra for taking on significantly more stress.
This current squeeze is nearly unprecedented outside of moments of total systemic panic, such as the global financial crisis or the initial shock of the pandemic. While high quality corporate earnings remain steady, they are no longer providing a meaningful hedge against the allure of government bonds which are now offering some of their juiciest yields in years. For those looking for value, the numbers suggest that the traditional edge once provided by large cap stocks has almost entirely evaporated.