Long-Term Returns — “Long-Term Returns” are the likely total returns (dividends plus price appreciation) that can be expected from an investment over the coming 10 years or so. Obviously, with such a long time horizon, it is impossible to forecast returns with perfect accuracy. However, it is helpful to have some reasonable expectations of long-term returns when investing. These return estimates are all before taxes, so your net after-tax returns in taxable accounts will be considerably less, depending on your tax bracket.
Here is the general formula we use for estimating the Long-Term Returns of an investment: Yield + Growth + Value Change = Nominal Long-Term Returns – Long-Term Inflation = Real Long-Term Returns.
Yield is the current income an investment provides divided by its price. For Stocks and REITs, it is the dividend yield. For Commodities, there is no income and no Current Yield. As a result, Commodities are the most difficult investments to estimate Long-Term Returns for, since the entire return is generated by future prices. For Bonds, Current Yield is the interest income yield. Bonds are generally the easiest investments to estimate Long-Term Returns for, since fixed income yields are directly observable and do not change and the principal amount is known.
Growth is the estimated long-term annual increase in dividends. The Growth estimate for a) Stocks is the historical dividend growth rate of 2% above inflation, since companies invest capital to grow, b) REITs is the historical dividend growth rate of 2% below inflation, since REITs must pay out their earnings as dividends and cannot invest retained earnings to grow, c) Commodities is zero, since they do not pay dividends or interest and d) Bonds is zero, since the Yield is the total long-term return for bonds to maturity.
Value Change is the most difficult variable to estimate in this equation. The Value estimate for Stocks and REITs is based on the following formula for calculating Nominal Long Term Returns: (1 + dividend growth) x (original yield / terminal yield) ^ (1 / number of years) - 1 + (original yield + terminal yield) / 2.
This Value formula has been very accurate historically in forecasting Nominal returns for the S&P 500 and US REITs in the past. The terminal yield for Stocks is the historical average yield of the S&P 500 of 4% and the terminal yield for REITs is the historical average yield of US REITs of 6%. The number of years is 10. Note that the Real return of the S&P 500 is generally consistent with the current Shiller P/E ratio. The Value estimate for Commodities is based on our assessment on whether they are in a secular bull or bear market, so it is highly subjective. The Value estimate for Bonds is zero, since the Yield is the total long-term return for Bonds (if the bond is held to maturity).
Nominal Long-Term Returns are the total expected returns including inflation.
Long-Term Inflation is the long-term expected inflation rate based on history and inflation expectations. It has averaged about 4% since WWII, but could be higher going forward given the explicitly inflationary policies of central banks. Or it could be lower if we have a deflationary depression like the 1930s, which is possible given the extreme amounts of leverage in the global financial system.
Real Long-Term Returns are the total expected returns after inflation. Investments in Secular Bull Markets tend to generate above average annual real returns (usually 5-10% or more), while investments in Secular Bear Markets tend to have subpar annual real returns below 5%.
While actual results will likely differ somewhat from these estimates (particularly for NASDAQ 100, US Small Cap and International Stocks and REITs, for which it is more difficult to estimate dividend growth and historical yields, as well as commodities), we believe these estimates are more reasonable than the typical assumption that historical results will continue forever in the future, regardless of valuation levels, or are based on faulty measures that have not worked in the past, such as the “Fed model”.