%
Stocks & Bonds
Allocation FormulaStocks & Bonds
12-1-24
Updated Monthly
Updated Monthly
% Allocation = 100 x (Current PE10 – Avg. PE10 / 4) / (Avg.PE10 x 2 – Avg. PE10 / 2)]
Formula's answer determines bond allocation.
Current PE10.....38.54
Core Bond Allocation: 133%
% Stock Allocation 0% (rounded)
% Bond Allocation 100% (rounded)
% Bond Allocation 100% (rounded)
Current Asset: Vanguard Long-Term Investment Grade Bond Fund
Logic behind this approach:
--As the stock market becomes more expensive, a conservative investor's stock allocation should go down. The rationale recognizes the reduced expected future returns for stocks, and the increasing risk.
--The formula acknowledges the increased likelihood of the market falling from current levels based on historical valuation levels and regression to the mean, rather than from volatility. Many agree this is the key to value investing.
Please note there is controversy regarding the divisor (Avg. PE10). The average since 1881 as reported by Multpl.com is 16.70. However, Larry Swedroe and others believe that using a revised Shiller P/E mean of 19.6 , the number since 1960 ( a 53-year period), reflects more modern accounting procedures.
DYI adheres to the long view where over time the legacy (prior 1959) values will be absorbed into the average. Also it can be said with just as much vigor the last 25 years corporate America has been noted for accounting irregularities. So....If you use the higher or lower number, or average them, you'll be within the guide posts of value.
Please note: I changed the formula when the Shiller PE10 is trading at it's mean - stocks and bonds will be at 50% - 50% representing Ben Graham's Defensive investor starting point; only deviating from that norm as valuations rise or fall.
Please note: I changed the formula when the Shiller PE10 is trading at it's mean - stocks and bonds will be at 50% - 50% representing Ben Graham's Defensive investor starting point; only deviating from that norm as valuations rise or fall.
Current Allocation:
Vanguard Long Term Investment Grade Bond Fund
Possible Allocations to Bonds vs Stocks:
Bonds %
100%+ Vanguard Long Term Investment Grade Bond Fund
99% to 65% Wellesley Income Fund
64% to 35% 1/2 Wellesley Income Fund - 1/2 Wellington Fund
34% to 0% Equity Income Fund
DYI
The Formula.
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The Formula.
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