Jon Corzine, the former chairman of bankrupt MF Global Holdings Ltd., may face claims for breach of fiduciary duty and negligence for his role in the company's downfall, according to a report by the trustee liquidating the firm's brokerage. "Liquidity had been a cause for concern before and throughout Mr. Corzine's tenure at MF Global, yet systems and tools that would enable accurate real time monitoring of liquidity were never implemented," James Giddens, the trustee for MF Global Inc., said in a 275-page report issued today on how the brokerage failed, leaving a $1.6 billion shortfall in what should have been protected customer accounts.