英文名称：Zero Cost Option 中文名称：零成本期权
"一种投资策略，指投资者购买一项期权时，同时卖出另外一项期权，两笔费用正好抵消。
e.g. Enter bullish zero-cost option strategy on 3-year Australian bond futures: RBA minutes, weak employment and housing data indicate previous rate hikes finally cooling economy. "
