Market Declines And The Problem Of Time

When stock markets rise, the bullish narrative tends to dominate, overlooking the potential impact of market declines. This oversight stems from two main problems: a basic misunderstanding of math and time’s critical role in investing. Every year, I receive the following chart as a counterargument when discussing the importance of managing risk during a portfolio’s life cycle. The chart shows that while the average bull market advance is 149%, the average bear market decline is just -32%.

So, why bother managing risk when markets rise 4.7x more over the long term than they fall?

bear bull

As with any long-term analysis, one should quickly realize the most critical issue for every investor—time.

The Reality of Long-Term Stock Market Returns

Yes, since 1900, the stock market has “averaged” an 8% annualized rate of return. However, this does NOT mean the market returns 8% every year. As we discussed recently, several key facts about markets should be understood.

  • Stocks rise more often than they fall: Historically, the stock market increases about 73% of the time. The other 27% of the time, market corrections reverse the excesses of previous advances. The table below shows the dispersion of returns over time.

average

However, to achieve that 8% annualized “average” rate of return, you would need to live for 124 years.