[
  {
    "date": "2024-07-31",
    "spot_open": 5505.6,
    "spot_close": 5522.3,
    "day_return": 0.304,
    "morning_return": 0.252,
    "post_fomc_return": 0.051,
    "day_range": 1.049,
    "cust_gamma_b":