"predictive market" meaning in English

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  "lang_code": "en",
  "pos": "noun",
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          "name": "English entries with incorrect language header",
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      "glosses": [
        "prediction market"
      ],
      "id": "en-predictive_market-en-noun-4qbYbyfP",
      "links": [
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          "prediction market",
          "prediction market"
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      "wikipedia": [
        "predictive market"
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  "word": "predictive market"
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{
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    {
      "form": "predictive markets",
      "tags": [
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  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "prediction market"
      ],
      "links": [
        [
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      ],
      "wikipedia": [
        "predictive market"
      ]
    }
  ],
  "word": "predictive market"
}