Probe Eyes Trades By Fund Titan

Prosecutors are examining trades made in an account overseen by hedge-fund titan Steven Cohen that were suggested by two of his former fund managers who have pleaded guilty to insider trading.

The development surfaced in court filings submitted in connection with a sweeping insider-trading investigation, which focuses on ways traders can receive nonpublic information from experts connected to industries or firms.

At issue is trading in a $3 billion stock portfolio personally overseen by Mr. Cohen at SAC Capital Advisors and referred to by the government in the filings as the "Cohen Account" and internally at SAC as "The Big