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4% Rule · Equity Exposure · Portfolio Longevity · Retirement Planning
RBC Global Asset Management's updated research, incorporating market data through March 2025, reaffirms William Bengen's 4% retirement withdrawal rule, demonstrating that a 60% equities/40% bonds portfolio successfully sustains a 4% inflation-adjusted withdrawal for at least 27 years, while a 100% cash portfolio fails in 81% of historical 30-year windows.
The study, conducted by D.E. Chornous, CFA, and J. Van der Walt, extends Bengen's 1994 analysis using 96 years of data from 1928 to 2023. It concludes that maintaining 50-75% equity exposure is optimal for portfolio longevity and wealth creation, even through market downturns.
While acknowledging high valuations in some U.S. equity markets like the NASDAQ and parts of the S&P 500, RBC GAM identifies attractive opportunities in the United Kingdom, Europe, and emerging markets. Investors are encouraged to strategically shift cash reserves into risk assets, recognizing that post-war market drawdowns typically recover within 2.5 to 4.75 years, making a long-term, disciplined approach essential for retirement success.
