> could softbank be a systemic risk to the entire world economy?
No. The Vision Fund itself is nowhere near large enough to be systemically important, even given a complete loss of all principal.
Also, a lot (most?) of the the risk from SIFIs (https://en.wikipedia.org/wiki/List_of_systemically_important...) is that they're counterparties in tens of thousands to tens of millions of relationships, many of which assume the counterparty is completely reliable. That's not true here; all Softbank and Vision Fund shareholders understand their capital is at risk. Banks also almost inherently use leverage (https://en.wikipedia.org/wiki/Basel_III#Leverage_ratio) more heavily than most other industries.
The other possible results you mentioned are market mechanics. For example, a reversion to more historically-normal P/E ratios is not something that SIFI tries to prevent (or encourage).
No. The Vision Fund itself is nowhere near large enough to be systemically important, even given a complete loss of all principal.
Also, a lot (most?) of the the risk from SIFIs (https://en.wikipedia.org/wiki/List_of_systemically_important...) is that they're counterparties in tens of thousands to tens of millions of relationships, many of which assume the counterparty is completely reliable. That's not true here; all Softbank and Vision Fund shareholders understand their capital is at risk. Banks also almost inherently use leverage (https://en.wikipedia.org/wiki/Basel_III#Leverage_ratio) more heavily than most other industries.
The other possible results you mentioned are market mechanics. For example, a reversion to more historically-normal P/E ratios is not something that SIFI tries to prevent (or encourage).