{
 "schema_version": 1,
 "slug": "silver-buffalo-round-1oz",
 "name": "1 oz Silver Buffalo Round",
 "metal": "silver",
 "oz": 1,
 "first_snapshot": "2026-10-15T05:00:54+00:00",
 "last_snapshot": "2026-11-11T14:49:33+00:00",
 "days_with_data": 27,
 "snapshots": 516,
 "daily": [
  {
   "date": "2026-10-15",
   "snapshots": 20,
   "dealers_quoted": 7,
   "median_premium_pct": 10.89,
   "lowest_premium_pct": 2.44,
   "spread_pp": 16.24,
   "spot_avg": 56.84
  },
  {
   "date": "2026-10-16",
   "snapshots": 7,
   "dealers_quoted": 7,
   "median_premium_pct": 6.99,
   "lowest_premium_pct": 2.42,
   "spread_pp": 16.07,
   "spot_avg": 57.57
  },
  {
   "date": "2026-10-17",
   "snapshots": 2,
   "dealers_quoted": 6,
   "median_premium_pct": 6.79,
   "lowest_premium_pct": 2.55,
   "spread_pp": 16.04,
   "spot_avg": 57.12
  },
  {
   "date": "2026-10-18",
   "snapshots": 12,
   "dealers_quoted": 6,
   "median_premium_pct": 6.79,
   "lowest_premium_pct": 2.5,
   "spread_pp": 16.04,
   "spot_avg": 57.37
  },
  {
   "date": "2026-10-19",
   "snapshots": 32,
   "dealers_quoted": 7,
   "median_premium_pct": 6.73,
   "lowest_premium_pct": 2.47,
   "spread_pp": 16.07,
   "spot_avg": 57.34
  },
  {
   "date": "2026-10-20",
   "snapshots": 22,
   "dealers_quoted": 6,
   "median_premium_pct": 6.6,
   "lowest_premium_pct": 2.36,
   "spread_pp": 15.96,
   "spot_avg": 57.82
  },
  {
   "date": "2026-10-21",
   "snapshots": 7,
   "dealers_quoted": 5,
   "median_premium_pct": 6.47,
   "lowest_premium_pct": 2.2,
   "spread_pp": 16.11,
   "spot_avg": 57.96
  },
  {
   "date": "2026-10-22",
   "snapshots": 23,
   "dealers_quoted": 6,
   "median_premium_pct": 6.97,
   "lowest_premium_pct": 2.54,
   "spread_pp": 16.63,
   "spot_avg": 55.02
  },
  {
   "date": "2026-10-23",
   "snapshots": 27,
   "dealers_quoted": 6,
   "median_premium_pct": 7.35,
   "lowest_premium_pct": 2.6,
   "spread_pp": 17.05,
   "spot_avg": 54.06
  },
  {
   "date": "2026-10-24",
   "snapshots": 30,
   "dealers_quoted": 7,
   "median_premium_pct": 6.99,
   "lowest_premium_pct": 2.76,
   "spread_pp": 16.87,
   "spot_avg": 54.05
  },
  {
   "date": "2026-10-25",
   "snapshots": 31,
   "dealers_quoted": 7,
   "median_premium_pct": 7.0,
   "lowest_premium_pct": 2.76,
   "spread_pp": 16.87,
   "spot_avg": 54.06
  },
  {
   "date": "2026-10-26",
   "snapshots": 18,
   "dealers_quoted": 7,
   "median_premium_pct": 6.94,
   "lowest_premium_pct": 2.56,
   "spread_pp": 17.11,
   "spot_avg": 54.1
  },
  {
   "date": "2026-10-27",
   "snapshots": 7,
   "dealers_quoted": 7,
   "median_premium_pct": 7.04,
   "lowest_premium_pct": 2.5,
   "spread_pp": 19.49,
   "spot_avg": 54.18
  },
  {
   "date": "2026-10-28",
   "snapshots": 2,
   "dealers_quoted": 7,
   "median_premium_pct": 7.94,
   "lowest_premium_pct": 2.33,
   "spread_pp": 19.71,
   "spot_avg": 54.06
  },
  {
   "date": "2026-10-29",
   "snapshots": 18,
   "dealers_quoted": 7,
   "median_premium_pct": 10.74,
   "lowest_premium_pct": 2.67,
   "spread_pp": 20.64,
   "spot_avg": 52.22
  },
  {
   "date": "2026-10-30",
   "snapshots": 26,
   "dealers_quoted": 6,
   "median_premium_pct": 13.62,
   "lowest_premium_pct": 2.9,
   "spread_pp": 22.39,
   "spot_avg": 49.68
  },
  {
   "date": "2026-10-31",
   "snapshots": 24,
   "dealers_quoted": 6,
   "median_premium_pct": 14.4,
   "lowest_premium_pct": 2.98,
   "spread_pp": 22.88,
   "spot_avg": 49.25
  },
  {
   "date": "2026-11-01",
   "snapshots": 22,
   "dealers_quoted": 6,
   "median_premium_pct": 14.4,
   "lowest_premium_pct": 2.98,
   "spread_pp": 22.98,
   "spot_avg": 49.49
  },
  {
   "date": "2026-11-02",
   "snapshots": 7,
   "dealers_quoted": 6,
   "median_premium_pct": 13.71,
   "lowest_premium_pct": 2.8,
   "spread_pp": 22.01,
   "spot_avg": 50.87
  },
  {
   "date": "2026-11-04",
   "snapshots": 20,
   "dealers_quoted": 6,
   "median_premium_pct": 9.59,
   "lowest_premium_pct": 2.7,
   "spread_pp": 17.9,
   "spot_avg": 52.42
  },
  {
   "date": "2026-11-05",
   "snapshots": 19,
   "dealers_quoted": 6,
   "median_premium_pct": 9.59,
   "lowest_premium_pct": 2.58,
   "spread_pp": 17.98,
   "spot_avg": 52.27
  },
  {
   "date": "2026-11-06",
   "snapshots": 23,
   "dealers_quoted": 6,
   "median_premium_pct": 9.67,
   "lowest_premium_pct": 2.76,
   "spread_pp": 17.9,
   "spot_avg": 52.07
  },
  {
   "date": "2026-11-07",
   "snapshots": 19,
   "dealers_quoted": 6,
   "median_premium_pct": 9.68,
   "lowest_premium_pct": 2.76,
   "spread_pp": 17.61,
   "spot_avg": 52.07
  },
  {
   "date": "2026-11-08",
   "snapshots": 21,
   "dealers_quoted": 6,
   "median_premium_pct": 9.68,
   "lowest_premium_pct": 2.76,
   "spread_pp": 17.61,
   "spot_avg": 52.38
  },
  {
   "date": "2026-11-09",
   "snapshots": 27,
   "dealers_quoted": 6,
   "median_premium_pct": 9.63,
   "lowest_premium_pct": 2.66,
   "spread_pp": 17.63,
   "spot_avg": 53.11
  },
  {
   "date": "2026-11-10",
   "snapshots": 37,
   "dealers_quoted": 7,
   "median_premium_pct": 9.6,
   "lowest_premium_pct": 4.45,
   "spread_pp": 16.26,
   "spot_avg": 52.16
  },
  {
   "date": "2026-11-11",
   "snapshots": 13,
   "dealers_quoted": 7,
   "median_premium_pct": 9.21,
   "lowest_premium_pct": 4.45,
   "spread_pp": 15.8,
   "spot_avg": 53.03
  }
 ],
 "dealers": [
  {
   "dealer": "mintbuilder",
   "snapshots": 503,
   "coverage_pct": 97.5,
   "avg_premium_pct": 2.81,
   "avg_rank": 1.19,
   "vs_market_median_pp": -6.34,
   "times_cheapest": 406,
   "premium_volatility_pp": 0.55,
   "price_changes": 255,
   "dealer_name": "MintBuilder"
  },
  {
   "dealer": "sdbullion",
   "snapshots": 512,
   "coverage_pct": 99.2,
   "avg_premium_pct": 8.13,
   "avg_rank": 2.77,
   "vs_market_median_pp": -1.09,
   "times_cheapest": 107,
   "premium_volatility_pp": 5.31,
   "price_changes": 137,
   "dealer_name": "SD Bullion"
  },
  {
   "dealer": "monument",
   "snapshots": 502,
   "coverage_pct": 97.3,
   "avg_premium_pct": 6.81,
   "avg_rank": 2.85,
   "vs_market_median_pp": -2.32,
   "times_cheapest": 0,
   "premium_volatility_pp": 0.25,
   "price_changes": 321,
   "dealer_name": "Monument Metals"
  },
  {
   "dealer": "kitco",
   "snapshots": 33,
   "coverage_pct": 6.4,
   "avg_premium_pct": 8.78,
   "avg_rank": 3.45,
   "vs_market_median_pp": -1.05,
   "times_cheapest": 1,
   "premium_volatility_pp": 0.68,
   "price_changes": 28,
   "dealer_name": "Kitco"
  },
  {
   "dealer": "hero",
   "snapshots": 241,
   "coverage_pct": 46.7,
   "avg_premium_pct": 7.16,
   "avg_rank": 3.77,
   "vs_market_median_pp": -0.06,
   "times_cheapest": 0,
   "premium_volatility_pp": 0.93,
   "price_changes": 32,
   "dealer_name": "Hero Bullion"
  },
  {
   "dealer": "agate",
   "snapshots": 483,
   "coverage_pct": 93.6,
   "avg_premium_pct": 14.61,
   "avg_rank": 4.26,
   "vs_market_median_pp": 5.3,
   "times_cheapest": 2,
   "premium_volatility_pp": 7.86,
   "price_changes": 128,
   "dealer_name": "Agate Metals"
  },
  {
   "dealer": "atcost",
   "snapshots": 349,
   "coverage_pct": 67.6,
   "avg_premium_pct": 14.53,
   "avg_rank": 4.75,
   "vs_market_median_pp": 4.42,
   "times_cheapest": 0,
   "premium_volatility_pp": 0.54,
   "price_changes": 210,
   "dealer_name": "At Cost Metals"
  },
  {
   "dealer": "apmex",
   "snapshots": 515,
   "coverage_pct": 99.8,
   "avg_premium_pct": 20.0,
   "avg_rank": 5.89,
   "vs_market_median_pp": 10.77,
   "times_cheapest": 0,
   "premium_volatility_pp": 0.97,
   "price_changes": 341,
   "dealer_name": "APMEX"
  }
 ],
 "method": "Premium % = price / (spot x oz) - 1 with the spot recorded in the same snapshot. vs_market_median_pp = mean over snapshots of (dealer premium - median dealer premium in that snapshot). Daily values are the median across that day's snapshots (ET days). Rank 1 = lowest premium in a snapshot. Vs market median = a dealer's premium minus the median dealer premium in the same snapshot, averaged (negative = below the market). Volatility = population std dev of a dealer's premium % across snapshots (removes spot moves). No values are interpolated; days without snapshots are absent."
}