It is alleged that Jim Cramer got divorced because his wife allegedly cheated on him for money and other material things, claims odssf.com. Jim Cramer's divorce is allegedly related to how he was driven out of live television for his malpractices in the stock market.
His wife, Karen Blackfish, was also a trader. They had two daughters until the time of their divorce in 2009. He attributes his success to his wife, and the fact that he was accused of fraud and market manipulation may be a reason that led to his divorce, though this is highly speculative information and not verifiable.