There appears to be an investigation by the SEC and the New York Attorney
General's Office into MBIA Inc concerning a restatement of finances for 1998
on. This may have affected MBIA stocks during the time period. If you go to
https://www.lawyersandsettlements.com/case/mbia there is more information on
this. There is also a free case evaluation for those who may have been
affected by it. I hope this might be of some help.
kr0