不过在这论文中,历史资料只有取二年来评估,这是比较可惜的,比较普遍的作法是将时间涵盖一个多头行情(Bull market)与一个空头行情(Bear market)以上,这样做的话,历史资料多数长达5或8年以上。
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趁市场行情上涨而赚钱的“多头”占了上风。
The "bulls", those who make money on a rising market, are in the ascendancy.
通常占整个多头市场行情的50%左右。
多头市场和空头市场分别描述的是上升市场行情和下跌市场行情,可指整个市场或指特定行业板块或特定股票。
The terms bull market and bear market describe upward and downward market trends, respectively, and can be used to describe either the market as a whole or specific sectors and securities.
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