(Bloomberg News) Lloyd C. Blankfein, chairman and chief executive officer of Goldman Sachs Group Inc., lost about $52 million of his personal wealth this month -- more than the combined losses of four other Wall Street CEOs.

The heads of Bank of America Corp., Citigroup Inc., JPMorgan Chase & Co., Morgan Stanley and Goldman Sachs saw the value of their combined shareholdings fall by $94 million on paper since July 29, based on regulatory filings. That includes a $40 million plunge yesterday.

The S&P 500 Financials Index of 81 companies fell 7.1 percent yesterday and is down 18 percent this month amid concern that the U.S. economy is weakening and firms may face losses linked to European sovereign debts. Bank of America declined the most among the five banks, dropping 11 percent yesterday to shed almost one-third of its market value since July 29.

"My entire net worth is in this company," Bank of America CEO Brian T. Moynihan, 51, said yesterday on a conference call hosted by mutual-fund manager Bruce R. Berkowitz, whose funds own the lender's shares. "We believe in the stock, and you'll see us buy the stock," Moynihan said of his management team.

The value of Moynihan's 485,904 shares dropped to $3.3 million yesterday from $4.7 million on July 29 as the Charlotte, North Carolina-based company fell to $6.77 in New York Stock Exchange composite trading.

Morgan Stanley's James P. Gorman, who entered the market to purchase 100,000 shares on Aug. 4 at an average price of $20.62 a share, watched his stock drop to $16.45 yesterday. Last week's purchase accounted for $417,070 of Gorman's $5.4 million in total stock losses since July 29.

Blankfein's Holdings

Moynihan's and Gorman's holdings paled next to Blankfein's 2.1 million Goldman Sachs shares, which were worth $232 million at yesterday's closing price of $110.34, down 18 percent since July 29.

After Blankfein, 56, the biggest loser was JPMorgan's James Dimon. His 5.08 million shares lost $31 million so far this month as New York-based JPMorgan slid 15 percent to $34.37 from $40.45.

"We will build this business," Dimon, 55, said in an interview on CNBC. "And I guarantee you in five years the stock will be higher than today."

Citigroup Inc.'s Vikram S. Pandit, 54, saw his paper wealth drop 26 percent to $13.1 million from $17.7 million before the start of August.