{
  "generated_at": "2026-07-02",
  "engine": "capital-gains-tlh-2026 (133-test suite, C-engine cross-checked)",
  "method": "NPV of harvesting a $10,000 loss across 768 scenarios: 2 filing statuses × 4 income regimes × 2 loss characters × 3 offset contexts × 4 future-rate scenarios × 4 horizons, 5% discount rate. Savings via exact engine diff (never rate×amount); the no-gains context discounts the tested multi-year carryforward projection. 2026 federal law (Rev. Proc. 2025-32), federal only.",
  "loss": 10000,
  "discount_rate": 0.05,
  "headline": {
    "total": 768,
    "pays": 602,
    "pays_pct": 78.4,
    "step_up_always_pays": true,
    "zero_bracket_trap_all_lose": true,
    "zero_bracket_worst_npv": -1864.79,
    "st_savings_800k": 4080,
    "st_npv_800k_n10": 1575.23,
    "lt_savings_800k": 2380,
    "lt_npv_800k_n10": 918.89,
    "st_over_lt_ratio": 1.71,
    "arb_negative_npv": -364.79,
    "mid_deferral_npv_n10": 579.13
  },
  "cells": 768
}