Blog.

Is the 4% Rule Still Safe? We Ran 5,000 Simulated Retirements
The 4% rule sounds settled. We ran flexible and rigid withdrawal policies through 5,000 identical market lifetimes to see what "safe" actually means, and what it costs.

What a 1% Fee Really Costs You Over 40 Years
One percent sounds trivial. We simulated 5,000 forty-year saving lifetimes at 0%, 0.5%, and 1% fee drag to measure what that annual charge actually removes at the finish line.

What Happens If the Market Crashes the Year You Retire?
The same market crash is a footnote at 48 and a crisis at 65. A look at sequence of returns risk, and why a crash the year you retire does the most damage.

Which Investing Strategy Actually Wins? We Benchmarked Six on the Same Markets
Everyone has a favorite investing strategy. We ran six through 5,000 identical market lifetimes — same household, same markets — to see which actually wins.

Monte Carlo Simulation in Personal Finance: Why Projections Fall Short
Monte Carlo simulation is the gap between a financial projection and a real plan. We ran one household through Killion’s full simulation engine to show why the odds, not the number, are what you actually plan against.

Does Staying Invested Actually Beat Timing the Market?
Timing the market can win on paper. Here is what forty years of real S&P 500 returns say about why staying invested almost always wins in practice.