curl --request GET \
  --url https://api.hayinsights.com/openapi/v1/etf/top-performance \
  --header 'X-API-Key: <api-key>'

{
  "success": true,
  "statusCode": 200,
  "data": [
    {
      "etfCode": "1321",
      "etfName": "NEXT FUNDS Nikkei 225 Exchange Traded Fund",
      "currentNav": 61538.17917892439,
      "changePercent": 10.96
    },
    {
      "etfCode": "1348",
      "etfName": "MAXIS TOPIX ETF",
      "currentNav": 3953.21351900172,
      "changePercent": 5.65
    }
  ],
  "meta": {
    "timestamp": "2026-06-19T08:50:32.000Z"
  }
}