WASHINGTON - Citigroup has agreed to pay $7 billion to settle a federal investigation into its handling of risky subprime mortgages, admitting to a pattern of deception that Attorney General Eric Holder said "shattered lives" and contributed to the worst financial crisis in decades.

US Attorney General Eric Holder (C) announces Citigroup Inc will pay $7 billion to settle a U.S. government investigation into mortgage-backed securities the bank sold in the run-up to the 2008 financial crisis, during a news conference in Washington July 14, 2014.[Photo/Agencies]

The bank, one of America's largest, will pay a $4 billion civil penalty, provide $2.5 billion in consumer relief and settle claims from state attorneys general.

The settlement stems from the sale of securities made up of subprime mortgages, which led to both the housing boom and bust that triggered the Great Recession at the end of 2007.

Banks, including Citigroup, minimized the risks of subprime mortgages when packaging and selling them to mutual funds, investment trusts, pensions, as well as other banks and investors. One Citigroup trader wrote in an internal email that he "would not be surprised if half of these loans went down" and said it was "amazing that some of these loans were closed at all," and the bank itself increased its profits and share of the market, the Justice Department said.

"They did so at the expense of millions of ordinary Americans and investors of all types - including other financial institutions, universities and pension funds, cities and towns, and even hospitals and religious charities," Holder said at a news conference announcing the settlement.

The securities, which contained so-called residential mortgage-backed securities, plunged in value when the housing market collapsed in 2006 and 2007 and investors suffered billions of dollars in losses. Those losses triggered a financial crisis that pushed the economy into the worst recession since the 1930s.

The Justice Department, which has faced criticism for not being aggressive enough in targeting financial misconduct, has in the last year taken action against some of the country's largest banks for their roles in the financial meltdown. JPMorgan Chase & Co, the nation's largest bank, last year agreed to pay $13 billion after an investigation into similar toxic-mortgage backed securities. Bank of America Corp. has been sued for failing to disclose risks and misleading investors in its sale of mortgage-linked securities.

Investors shrugged off the settlement, a sign that they expect Citigroup will continue to operate without much disruption. Shares in Citi rose $1.67 or 3.6 percent to $48.67 because the bank beat the expectations in the market, after adjusting for the second-quarter $3.8 billion charge related to the Justice Department settlement.

In total, the settlement represents slightly more than half of Citigroup's $13.1 billion profit last year.

Justice Department officials called the $4 billion the largest civil penalty of its kind and said it will not be tax-deductible. The $2.5 billion in consumer relief will include financing for construction and affordable rental housing, as well as principal reduction and forbearance for residential loans.

CEO Michael Corbat said the settlement ends all pending civil investigations related to Citigroup's handling of mortgage-backed securities.

Citigroup said its net income dropped in the second quarter after the settlement was arranged.

On a per-share basis, net income was 3 cents, compared with $1.34 in the second quarter a year earlier. Excluding the charges and an accounting loss, the bank's second-quarter profit rose 1 percent to $3.93 billion, or $1.24 a share.

Revenue was $19.4 billion, excluding the accounting loss, compared with $20 billion a year earlier.

The two sides had earlier been far apart in their negotiations. The Justice Department was preparing to sue the bank last month after it offered to pay under $4 billion to resolve the matter, a sum substantially less than what the government was seeking.

Holder said the settlement did not erase the possibility of criminal prosecution for the bank or individual employees in the future.

Recent criminal cases against banks have included a $2.6 billion guilty plea from Swiss bank Credit Suisse for helping wealthy Americans evade taxes, and an $8.9 deal with BNP Paribas related to its handling of transactions for clients in Sudan, Iran and Cuba.