Getting into the market when stocks are highly valued can work against an investor. Even over time horizons as long as 20 years or more, investing in high-valuation environments can lead to below-average returns. Conversely, if stock valuations are low when the investor begins, he or she may be able to ride a secular bull market* to above average returns.
Even young investors with long time horizons must be careful not to assume too much risk in an overvalued market, even if the long-term return eventually averages out to what was initially anticipated. And unfortunately, retirees taking withdrawals can suffer even more from an unfavorable sequence of returns.
Where are we now?
The concept is relatively straightforward: Higher valuations tend to lead to extended periods of sub-standard performance. For example, if you bought an index fund tracking the Standard & Poor’s 500 (S&P 500) when valuations were at an all-time high in mid-2007, how long would it have taken you to recoup the 38.49 percent decline in the S&P 500 in 2008?
Retirees need to pay attention too
The implications of market valuations extend beyond just when to invest. Market valuations also have a significant impact on determining a safe withdrawal rate when someone retires. Those who retire in favorable valuation markets generally have safe, sustainable spending levels that start higher than those who retire when stocks are overvalued.
Market valuation can also be relevant for tax decisions. Investors often try to hold their shares for tax reasons—some hold an appreciated position long enough for it to qualify for preferential long-term capital gains rates, then they sell. Others are simply unwilling to sell a position and take a gain (and some risk) off the table because of the tax impact.
The bottom line is that a long-term average is a useful piece of information, but it doesn’t tell the whole story. And once you begin to account for how markets are valued, the implications quickly spread beyond just a discussion of portfolio composition.
