It's also good news if prices fall due to the collapse of a speculative bubble.
即使价格下降是由于投机泡沫的破灭造成的，也仍然是个好消息。
Instead, they buy futures and options which they settle with a cash payment when they fall due.
相反，他们购买的是那些到期时以现金支付的期货及期权。
Instead, they buy futures and options which they settle with a cash payment when they fall due.
相反，他们购买的是那些到期时以现金支付的期货及期权。
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