Is the 4% Rule Safe? K-Dense Web Stress-Tests 155 Years of US Retirement Outcomes
K-Dense Web simulated every 30-year US retirement since 1871. The 4% rule failed 3% of the time, and more realistic assumptions pushed that rate higher.
8 min read
Author
Yuhuan He
AI Engineer, K-Dense
Yuhuan He is an AI engineer at K-Dense and a co-author of the K-Bench benchmark. The posts here walk through real K-Dense Web sessions and the verification steps behind their results.
Posts by Yuhuan He
Normal Hemoglobin, Empty Tank: How Common Is Hidden Iron Deficiency in US Women?
K-Dense Web analyzed CDC NHANES data and found that 3 in 4 iron-deficient US women have normal hemoglobin. Then an independent reviewer checked the report.
9 min readA Traffic Jam With No Cause: K-Dense Web Rebuilds the Sugiyama Ring-Road Experiment
K-Dense Web reproduced the famous 22-car ring-road jam in simulation, then checked every result against linear theory and the original paper before trusting it.
10 min read
