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NEW YORK, April 29 (Reuters) - Bank of America Corp (BAC.N: Quote, Profile, Research) on Tuesday sold $6 billion in debt, as banks move to shore up their capital base after writing down billions in bad mortgage bets.

Investment banks have been raising capital through sales of debt and preferred shares after recording losses from writing down the value of risky debt including securities backed by residential mortgages.

Bank of America, the largest U.S. retail bank, last week posted a 77 percent decline in quarterly profit as a growing number of consumers and real estate developers failed to repay loans. For details, see [ID:nN21410537]

The sale included $2 billion in five-year notes priced to yield 1.85 percentage points over U.S. Treasuries and $4 billion of 10-year notes priced to yield 1.90 percentage points over Treasuries, according to International Financing Review, a Thomson Reuters publication.

Bank of America also sold $4 billion in preferred shares on Thursday. Banc of America Securities is the sole lead manager on the sale. (Reporting by Caryn Trokie and Karen Brettell; Editing by Diane Craft)