軟銀被揭露買進大量科技股的買權。
不過就 Bloomberg 的說法，實際上軟銀只是比較有名，他的交易量在近期大量增加的買權合約中並不具有主導地位。
總之，可能是大家嫌股票漲太慢，就去買進買權了，而如果這個時候股票漲了，那些賣出買權的交易員/券商/投資人，可能就要買股票來避險，這麼一來又繼續推升股價跟買權波動率......就會吸引更多人跳進來買買權。
感覺像最近的流動性挖礦，覺得挖礦太慢，手續費太貴，然後直接去買幣.......然後，壽司就變成壽衣了。
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“Softbank as a call buyer makes sense, as does the underlying buying it generates. But trades less than 10 contracts swamped the rumored Softbank buys, so clearly others were trying to tag along for the ride,” Goepfert said. “Not sure why now versus other years, other than stay-at-home boredom. Maybe the retail crowd saw this as their last, best change to get rich quick.”
Asked if options positions in the market, which can force dealers to buy shares to hedge when they start to move, might be a catalyst in moves like Salesforce.com’s, Tengler said: “Yeah definitely,” adding, “I’m not an options expert, but it does drive short-term moves pretty dramatically.”
https://www.bloomberg.com/news/articles/2020-09-05/huge-swings-in-options-overrun-stocks-leave-fund-manager-baffled?sref=nX3sHuam
