{
  "meta": {
    "engine": "withdrawal-strategies-1.0.0",
    "seed": 20260711,
    "primary_alloc": "60/40"
  },
  "headline": {
    "alloc": "60/40",
    "fail_rate_4pct": 0.1704,
    "fail_rate_guardrails": 0.0109,
    "share_of_failures_converted": 0.936,
    "guardrails_max_spend_drawdown_median": 0.2662,
    "legacy_cost_vs_4pct": 0.3951
  },
  "finding": "On 60/40 over 35 years, the 4% rule fails on 17.0% of paths; Guyton-Klinger guardrails starting at 5% cut that to 1.1% \u2014 converting 94% of the 4%-rule failures into spending cuts (a typical worst-case max real-spending drawdown of 27%) while giving up 40% of median real legacy."
}