Well, in the US, equity trades are reported to the consolidated tape no later than end of day. The issue isn't that they don't report their assets and liabilit

Well, in the US, equity trades are reported to the consolidated tape no later than end of day. The issue isn't that they don't report their assets and liabilities, or their positions (which they mainly do), but they don't report their risk. That's mainly because nobody can agree on how to measure that, though. There isn't some standard, meaningful number that they have but don't report - they all have their own proprietary, easily gamed methodologies for that.