That wasn't actually the case for the examples I cited or hundreds of others. There are two kinds of bankruptcy, the SHLD kind that is obvious for some time and the unexpected kind due to some kind of external shock to the financial system (i.e. Bear Stearns) or fraud in the financial statements. I'm not in any way suggesting that I suspect IB is engaged in financial statement fraud or that we have a systemic financial shock imminent. However I am quite adamantly insisting that by their very nature both are unknowable until after it's too late to do anything about it. To think otherwise is to ignore history, much of it very recent.
I disagree. Problems like this always show up first where it matters most: the stock price.