{
  "components": [
    {
      "week": "2026-08-13 00:00:00",
      "comparable_price_index": 100.0,
      "cpi_lo": 100.0,
      "cpi_hi": 100.0,
      "dispersion_median_gap": 0.1546,
      "disp_lo": 0.1532,
      "disp_hi": 0.1648,
      "promo_share": NaN,
      "depth_mean": NaN,
      "depth_sd": NaN,
      "basket_K1": 34.1664,
      "basket_K2": 31.4286,
      "basket_unconstrained": 29.5234,
      "circular_depth_median": 0.2236,
      "circular_items": 469,
      "access_affordability": NaN,
      "composite_equal_illustrative": NaN,
      "composite_alt_illustrative": 0.6251
    },
    {
      "week": "2026-08-20 00:00:00",
      "comparable_price_index": 99.654,
      "cpi_lo": 99.2336,
      "cpi_hi": 100.0892,
      "dispersion_median_gap": 0.1542,
      "disp_lo": 0.1487,
      "disp_hi": 0.1546,
      "promo_share": 0.0427,
      "depth_mean": 0.2905,
      "depth_sd": 0.1901,
      "basket_K1": 32.4038,
      "basket_K2": 29.7347,
      "basket_unconstrained": 28.951,
      "circular_depth_median": 0.2241,
      "circular_items": 483,
      "access_affordability": NaN,
      "composite_equal_illustrative": 0.1338,
      "composite_alt_illustrative": -0.347
    },
    {
      "week": "2026-08-27 00:00:00",
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      "cpi_lo": 98.1883,
      "cpi_hi": 99.187,
      "dispersion_median_gap": 0.1544,
      "disp_lo": 0.1542,
      "disp_hi": 0.1546,
      "promo_share": 0.029,
      "depth_mean": 0.3293,
      "depth_sd": 0.2052,
      "basket_K1": 34.8666,
      "basket_K2": 31.0668,
      "basket_unconstrained": 29.5677,
      "circular_depth_median": 0.2463,
      "circular_items": 486,
      "access_affordability": NaN,
      "composite_equal_illustrative": 0.6202,
      "composite_alt_illustrative": -0.0335
    },
    {
      "week": "2026-09-03 00:00:00",
      "comparable_price_index": 99.4984,
      "cpi_lo": 99.0486,
      "cpi_hi": 99.9052,
      "dispersion_median_gap": 0.1544,
      "disp_lo": 0.1512,
      "disp_hi": 0.1546,
      "promo_share": 0.0436,
      "depth_mean": 0.2906,
      "depth_sd": 0.1997,
      "basket_K1": 33.0893,
      "basket_K2": 29.2395,
      "basket_unconstrained": 27.9327,
      "circular_depth_median": 0.2303,
      "circular_items": 530,
      "access_affordability": NaN,
      "composite_equal_illustrative": 0.2142,
      "composite_alt_illustrative": -0.1756
    },
    {
      "week": "2026-09-10 00:00:00",
      "comparable_price_index": 100.0647,
      "cpi_lo": 99.5442,
      "cpi_hi": 100.4976,
      "dispersion_median_gap": 0.1544,
      "disp_lo": 0.1464,
      "disp_hi": 0.1546,
      "promo_share": 0.0425,
      "depth_mean": 0.2885,
      "depth_sd": 0.2047,
      "basket_K1": 31.8767,
      "basket_K2": 29.6128,
      "basket_unconstrained": 28.1203,
      "circular_depth_median": 0.237,
      "circular_items": 590,
      "access_affordability": NaN,
      "composite_equal_illustrative": 0.1921,
      "composite_alt_illustrative": -0.2716
    },
    {
      "week": "2026-09-17 00:00:00",
      "comparable_price_index": 100.2457,
      "cpi_lo": 99.6763,
      "cpi_hi": 100.7577,
      "dispersion_median_gap": 0.1527,
      "disp_lo": 0.1432,
      "disp_hi": 0.1544,
      "promo_share": 0.0461,
      "depth_mean": 0.3141,
      "depth_sd": 0.275,
      "basket_K1": 32.1657,
      "basket_K2": 29.616,
      "basket_unconstrained": 28.281,
      "circular_depth_median": 0.2236,
      "circular_items": 589,
      "access_affordability": NaN,
      "composite_equal_illustrative": 0.1232,
      "composite_alt_illustrative": -0.0236
    },
    {
      "week": "2026-09-24 00:00:00",
      "comparable_price_index": 100.3667,
      "cpi_lo": 99.7837,
      "cpi_hi": 100.8567,
      "dispersion_median_gap": 0.1527,
      "disp_lo": 0.1433,
      "disp_hi": 0.1544,
      "promo_share": 0.0516,
      "depth_mean": 0.3044,
      "depth_sd": 0.2801,
      "basket_K1": 32.3216,
      "basket_K2": 28.4099,
      "basket_unconstrained": 27.1763,
      "circular_depth_median": 0.2236,
      "circular_items": 595,
      "access_affordability": NaN,
      "composite_equal_illustrative": 0.072,
      "composite_alt_illustrative": 0.1267
    },
    {
      "week": "2026-10-01 00:00:00",
      "comparable_price_index": 100.802,
      "cpi_lo": 100.2437,
      "cpi_hi": 101.3218,
      "dispersion_median_gap": 0.1511,
      "disp_lo": 0.1404,
      "disp_hi": 0.1544,
      "promo_share": 0.0578,
      "depth_mean": 0.2972,
      "depth_sd": 0.2488,
      "basket_K1": 31.0905,
      "basket_K2": 27.8308,
      "basket_unconstrained": 26.9732,
      "circular_depth_median": 0.2088,
      "circular_items": 692,
      "access_affordability": NaN,
      "composite_equal_illustrative": -0.272,
      "composite_alt_illustrative": -0.0701
    },
    {
      "week": "2026-10-08 00:00:00",
      "comparable_price_index": 100.8131,
      "cpi_lo": 100.207,
      "cpi_hi": 101.3248,
      "dispersion_median_gap": 0.1513,
      "disp_lo": 0.1427,
      "disp_hi": 0.1544,
      "promo_share": 0.0678,
      "depth_mean": 0.2722,
      "depth_sd": 0.2434,
      "basket_K1": 31.1654,
      "basket_K2": 27.6367,
      "basket_unconstrained": 26.6867,
      "circular_depth_median": 0.2236,
      "circular_items": 737,
      "access_affordability": NaN,
      "composite_equal_illustrative": -0.4719,
      "composite_alt_illustrative": -0.0313
    },
    {
      "week": "2026-10-15 00:00:00",
      "comparable_price_index": 101.3078,
      "cpi_lo": 100.789,
      "cpi_hi": 101.8291,
      "dispersion_median_gap": 0.1407,
      "disp_lo": 0.1336,
      "disp_hi": 0.1516,
      "promo_share": 0.0636,
      "depth_mean": 0.2608,
      "depth_sd": 0.2192,
      "basket_K1": 31.1654,
      "basket_K2": 27.1084,
      "basket_unconstrained": 27.1084,
      "circular_depth_median": 0.2371,
      "circular_items": 661,
      "access_affordability": NaN,
      "composite_equal_illustrative": -0.8951,
      "composite_alt_illustrative": 0.321
    },
    {
      "week": "2026-10-22 00:00:00",
      "comparable_price_index": 100.6884,
      "cpi_lo": 100.1056,
      "cpi_hi": 101.2119,
      "dispersion_median_gap": 0.1513,
      "disp_lo": 0.1368,
      "disp_hi": 0.1544,
      "promo_share": 0.0541,
      "depth_mean": 0.2877,
      "depth_sd": 0.2573,
      "basket_K1": 31.1654,
      "basket_K2": 27.9066,
      "basket_unconstrained": 27.9066,
      "circular_depth_median": 0.2291,
      "circular_items": 809,
      "access_affordability": NaN,
      "composite_equal_illustrative": -0.2028,
      "composite_alt_illustrative": -0.1201
    }
  ],
  "note": "component 5 not computed; composites are illustrations with prespecified weights, not estimates"
}