I’m not an expert either, but here’s my read.
First, it’s “raising eyebrows” for a few reasons depending on your POV. Softbank is a Japanese company playing for big money in the US market. This isn’t necessarily a bad thing, but many people will view this as a red flag. Softbank is a holding company, not terribly different from Buffett’s Berkshire Hathaway, and it’s principal goal is to invest it’s shareholders money into stable, growing businesses to build long-term wealth. They are NOT a hedge fund which plays the market for short term gains, which is what these types of trades signal. So Softbank is getting out of it’s lane a bit here. Lastly, it could be viewed as a form of market manipulation or insider trading, though I don’t think there’s any evidence that it’s somehow fraudulent in any way, but it could be considered artificial. It’s also the scale that’s notable, one investor moving markets is going to get people talking no matter what.
What does it mean, who knows. I think this hints that Softbank is predicting something dynamic will happen to the market. We’re very overdue for a serious market correction. For the last 18-24 months or so experts have been predicting a major adjustment and it hasn’t happened. Even through the pandemic the blue chip stocks, and the market in general, have been holding strong. It might be a bet that the blue chips will contract dramatically or insurance against the same, or they could be a bet that they will spike for some reason. Maybe these trades are meant to temporarily bolster the value of the stocks as part of some tactic we don’t know about. Without knowing exactly what the trades look like it’s hard to know how it all fits together.
I don’t think it’s at all important that they are buying options on stocks they own major stakes in. First, Softbank is not a single entity. The traders that are managing their holdings and their private equity are different than those playing around with options and futures. These options also boosted the prices of the stocks they own over the short term, so for many of their investors this is a good thing.
For a company as large as Softbank, I don’t think this really represents much of a risk. They could absorb any losses and these options aren’t all-or-nothing bets, they are what they say…options, meaning executing them is optional for the person taking out the contract, they only risk the premium. The types of options Softbank bought are call options, those are considered very low risk. In fact the premium you pay is specifically because they defer risk. Selling options however is very high risk…they didn’t do that.
Perhaps the biggest reason that this is a news story is because once it’s exposed the investor loses their advantage. Other institutional investors will see this and start counteracting it, in this case knowing that the spiking trade volume was sparked by a single buyer, and not the market at large, is really valuable knowledge. It also means that if Softbank saw an opportunity, then everyone else will try and copy them which implicitly cancels out that opportunity. Once something becomes conventional knowledge there’s no longer a gap to be exploited.