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Navigating Lost Decades
Published on 03/30/2026
"Stocks for the long run" has become axiomatic in investment management. The premise is straightforward: over sufficiently long horizons, equity returns reliably exceed inflation and alternative asset classes, rewarding patient investors who maintain exposure through inevitable periods of volatility. This framework underpins the majority of retirement planning, the growth of passive investment vehicles, and the standard advice dispensed to individual investors: stay invested, do not attempt to time the market, and trust in the long-term equity risk premium.
The conventional wisdom that equities reliably reward patient investors over long horizons obscures a critical historical pattern: secular bear markets, or "lost decades," have consumed approximately 35% of U.S. equity market history since 1871.
During these extended periods, buy-and-hold investors experienced negative or negligible real returns spanning 13 to 25 years, while simultaneously enduring drawdowns of 50% to 77% along the way. This paper examines 155 years of equity market data from Robert Shiller’s authoritative dataset maintained at Yale University to demonstrate that lost decades are structural features of equity markets rather than statistical anomalies.
Current market conditions warrant particular attention.
The Cyclically Adjusted Price-to-Earnings ratio (CAPE) currently resides near the 99th percentile across 155 years of observations.
Historically, valuation extremes have coincided with environments in which forward returns became more variable and downside risk more asymmetric.
While valuation measures such as CAPE have demonstrated meaningful long-term relationships with subsequent returns, they do not reliably identify the timing of market turning points. Instead, they provide important context regarding the vulnerability of long-term return expectations and the potential for regime transitions to occur.
The historical record, however, reveals uncomfortable exceptions to this comfortable narrative. In modern market history, U.S. equity investors experienced three extended periods during which buy-and-hold strategies delivered negligible or negative real returns:
1929 to 1954 (25 years), 1966 to 1982 (16 years), and 2000 to 2013 (13 years).
These "lost decades" consumed 54 years of market history—approximately 35% of the period since 1871.
For investors whose accumulation or distribution phases coincided with these regimes, the theoretical long-term equity premium provided cold comfort.
The assertion that "stocks always win in the long run" is empirically false. But how long? Stocks usually win in the long run, but the exceptions are neither rare nor brief.
A 16% probability of sub-3% real returns over 20 years represents a one-in-six chance that two full decades of an investor’s prime accumulation years deliver essentially nothing, representing a meaningful risk for retirement planning.
DYI: I’ve been pounding the table for longer than I care to admit
as the market as measured by the S&P 500 has increased in price producing
breath taking returns since 2009.
At this time IMO it is not the return on money but the return
of your money! I’m not going to go through all of the
valuation metrics highlighting the massive overvaluation for the U.S. stock
market as that has been covered (and will continue to be covered) in my
blog.
For those whose only savings is a 401k, Thrift Savings Plan,
and/or Roth IRA that only has stocks and bond investments choosing a
significantly heavier allocation to short and long term bonds is warranted
IMO.
Individuals soon to be retired may want to use DYI’s formulas
for the 4 primary asset categories and/or the purchase of annuities along with
monies in The Permanent Portfolio Fund symbol PRPFX that has a reasonable possibility
of delivering returns greater than short term bond investments.
Updated Monthly
AGGRESSIVE PORTFOLIO - ACTIVE ALLOCATION - 6/1/26
Active Allocation Bands (excluding cash) 0% to 50%
48% - Cash -Short Term Bond Index - VBIRX
28% -Gold- Global Capital Cycles Fund - VGPMX **
24% -Lt. Bonds- Long Term Bond Index - VBLTX
0% -Stocks- Total Stock Market Index - VTSAX
[See Disclaimer]** Vanguard's Global Capital Cycles Fund maintains 25%+ in precious metal equities the remainder are domestic or international companies they believe will perform well during times of world wide stress or economic declines.
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