"Citigroup's stock [C 4.71 -1.69 (-26.39%) ] plunged below $5—a 13-year low—and the banking giant's troubles may be just beginning.
Most institutional investors and pension funds are barred from owning stocks below $5. So if Citigroup's stock remains below that level, it could
trigger a wave of selling that would send the share price even lower.
I actually heard some talking heads on CNBS saying that they were having that weird deja vu feeling like when Bear, Lehman, and Wachovia collapsed
about Citigroup. I dunno, they are probably in the "too big to fail" category, but hell anything could happen.