It sounds like Tricom's customers weren't coughing up money to meet there margin calls fast enough.
The Tricom fiasco has amplified America's jitters. For something to have such a great affect we must assume it is real but I have been unable to find out why.
The only good clue I've had was on ABC radio when an "expert" was explaining that Tricom's business model was not that of a conventional margin lender, which are invariably parts of banks. With them, the equities are still in the punter's name and the the bank lends against his/her shares. Simple commercial practice. But with Tricom the punter put up the margin and Tricom bought the shares and deposited the scrip with a bank who lent against them.
At this point I'm not sure if the reporters know the difference between conventional margin and CFDs, but I suspect not. I think Tricom was big in CFDs. Either way, if the market value of the shares drop markedly the bank will make a call against Tricom who will then do the only thing they can do and sell stock, which they did, but buyers will only pay for them at T+3. Doesn't help much when you have to settle by 12.30. LOL I suspect some had their positions closed out without being outside agreed limits even.
I mentioned Whackamole earlier but it seems these, major, forced sales just keep popping up their heads.
If anyone can fill in or correct this, I'd be grateful. Regards.
BTW Counter-party risk is looming as a much, much bigger problem than the few piddlin dollars at risk with "liar loans".