In order to simplify retirement investment we are replacing our iM-Vanguard/TIAA-CREF Systems (updated monthly) with three iM-FlipSaver Models (updated weekly).
Prudent investors have assets allocated to both bonds and stocks. This conservative strategy is found in the Vanguard LifeStrategy Funds that invest statically in bonds and stocks and also in Life-Cycle/Target-Date Retirement Funds.
Instead of a static bond/stock ratio, these models change allocation in accordance with stock market conditions; e.g. during up-market periods the models hold more stocks than bonds, and during down-market periods the allocation “flips” to holding less stocks than bonds. This should improve performance and reduce drawdowns.