"in-and-out trading" meaning in English

{
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      "expansion": "in-and-out trading (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "examples": [
        {
          "ref": "1957, United States. Congress. House. Committee on Agriculture, Milk: Hearings Before the Subcommittee on Dairy Products:",
          "text": "Virtually all of this in-and-out trading was speculative, as is usually the case when traders enter and leave the market on the same day.",
          "type": "quote"
        }
      ],
      "glosses": [
        "The practice of buying shares and then selling them shortly afterward."
      ],
      "id": "en-in-and-out_trading-en-noun-KQx0em5h",
      "links": [
        [
          "finance",
          "finance#Noun"
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        [
          "buy",
          "buy"
        ],
        [
          "share",
          "share"
        ],
        [
          "sell",
          "sell"
        ]
      ],
      "raw_glosses": [
        "(finance) The practice of buying shares and then selling them shortly afterward."
      ],
      "tags": [
        "uncountable"
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      "topics": [
        "business",
        "finance"
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  "word": "in-and-out trading"
}

{
  "head_templates": [
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        "head": "in-and-out trading"
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  "lang_code": "en",
  "pos": "noun",
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        {
          "ref": "1957, United States. Congress. House. Committee on Agriculture, Milk: Hearings Before the Subcommittee on Dairy Products:",
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        }
      ],
      "glosses": [
        "The practice of buying shares and then selling them shortly afterward."
      ],
      "links": [
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          "finance",
          "finance#Noun"
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          "buy",
          "buy"
        ],
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          "sell"
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        "(finance) The practice of buying shares and then selling them shortly afterward."
      ],
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        "business",
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  "word": "in-and-out trading"
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