[
  {
    "symbol": "SPY",
    "metric": "prev_close",
    "price": 500.0,
    "as_of": "2026-05-22T20:00:00Z"
  },
  {
    "symbol": "SPY",
    "metric": "last_trade",
    "price": 492.0,
    "as_of": "2026-05-23T14:30:00Z"
  },
  {
    "symbol": "SPY",
    "metric": "daily_bar",
    "price": 492.0,
    "as_of": "2026-05-23T14:30:00Z"
  }
]