Fact: Cheney had not been a part of Halliburton for a year when these people bought their stock.
Fact: One shareholder gained money, one lost a small amount.
Fact: The accounting changes were disclosed in the annual report. Shareholders should exercise due diligence.
CLUE: Cheney was included in the lawsuit because he's vice-president and Klayman wanted the publicity. For no other logical reason.
But we do not know how much of these fraudulent practices were already in place when Cheney was part of the company, even if they had "changed" their accounting practices.