投资者也可以卖出看涨期权(以预定价格购买的权利),但这种操作的风险更高,而且需要抵押。因此,笔者还是坚持看跌期权。
It cost 0.045 of a bitcoin, or $49.50, to buy a put contract to sell 1/10 of a bitcoin at a strike price of $1,100 per bitcoin. The contract expires at the end of the month and will expire worthless if the price of a bitcoin is above $1100 at that point. But the value of the contract will go up before then as long as the value of a bitcoin drops.
以比特币单价1,100美元的执行价格出售十分之一个比特币的看跌合约,每一份合约的成本为0.045个比特币或49.50美元。合约于月底期满,如果期满时比特币的价格超过1,100美元,则各个合约便毫无价值可言。但如果比特币价格下跌,则合约价值将上涨。
Let's supposed bitcoins were to fall to $500 by the end of December, a 55% plunge in less than a month.
假设截止12月底,比特币价格已经下跌到500美元,即在不到一个月时间内暴跌55%。
If that were to happen, the price of my bitcoin put contract would jump.
此时,比特币看跌合约的价格将上涨。
Here's the problem: To book my profit, I ultimately want dollars.
可问题在于:要实现利润,我最终希望拿到的是美元。
With normal currency options you can choose to collect in whatever currency you are using to bet against another currency. So if you are betting the price of a euro will fall against a dollar, you can collect in dollars when the contract settles, thereby offsetting the fact that the euro just dropped in value.
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