I wouldn't touch GE with a long pole. A short one, perhaps. . . . ok, who wants bad puns. . ..
I think that Markopolos' claims have merit. And, at -13%, the market thinks so as well.
The core of Markopolos' claims are GE's long term care insurance which was booked as earnings (income, profit, whatever), and not held in reserve for the eventual pay-out. Booking them as such helped GE to 'make the numbers' quarter after quarter for years (decades?). Now the inside parties (beneficiaries) are in need of care and it's time to pay the piper, so to speak. Lots of losses ahead.
Caveat Emptor.