{
  "version": 1,
  "underlyings": [
    { "underlying": "SPX", "roots": ["SPX", "SPXW", "SPXQ"] },
    { "underlying": "QQQ", "roots": ["QQQ", "QQQX"] },
    { "underlying": "VIX", "roots": ["VIX"] },
    { "underlying": "VIX9D", "roots": ["VIX9D"] },
    { "underlying": "VIX3M", "roots": ["VIX3M"] },
    { "underlying": "ES", "roots": ["ES"] },
    { "underlying": "NDX", "roots": ["NDX", "NDXP"] },
    { "underlying": "RUT", "roots": ["RUT", "RUTW"] }
  ]
}