IB is not having the issues Robinhood had over the last few weeks. For me IB has not crashed while using their platform. I think they learned their lesson when FX imploded during the Swiss Central Bank move."Yep, I do see IB has stronger healthy position along compared to other brokers. Alternatively investors can pull their cash and park in stronger banks if feels uncomfortable with the best broker's exposure."
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You don't know how measure a brokerage firm strength. You certainly then don't know how to measure a bank's finance which is much more complex to analyze.