[Quarrel]

They're a bank.

They have capital ratios to maintain.

If the underlying assets (the assets backing the bank), move in value, then they need to provide extra capital from somewhere. This is them securing that capital base that they need due to the change in value of their current assets (largely US treasuries and mortgage back securities- this isn't really about the value of their tech portfolio).

[robmiller]

As of March 15, 2020, bank cash reserve requirement was reduced to zero for all depository institutions.[0]

0 - https://www.federalreserve.gov/monetarypolicy/reservereq.htm

[kasey_junk]

That’s the reserve requirement and doesn’t have anything to do with their capital requirements.

The fed, fdic and occ all regulate banks capital and have strict requirements around it. Not to mention their equity holders.

[JumpCrisscross]

Reserve requirements != capital requirements, the latter having replaced the former in modern banking.

[notch898a]

What are those ratios? Can I find them somewhere?

[hn_throwaway_99]

https://www.federalreserve.gov/supervisionreg/large-bank-cap...

https://www.statista.com/statistics/1097633/cet1-ratio-large...

[notch898a]

Thank you! I kept seeing the 0% reserve ratios and was wondering what they were actually going off of.

[Quarrel]

Others have given you some US specific answers, but they're broadly set for most of the global banking world by the Basel accords.

The world is currently trying to meet the Basel III standard:

https://en.wikipedia.org/wiki/Basel_III

The situation in any specific country can be bit different in the timelines and ways they meet the standard however.

[kasey_junk]

Bank capital requirements are huge and cross many regulatory regimes. The simple ratios you’ll see online are reserve requirements which are orthogonal to capital requirements.