New York: American Home Mortgage Investment, the troubled mortgage lender, was due to close on Friday that the latest company to fail this year as loans to home buyers, even with better credit history go wrong.

In a press release issued Thursday evening, American Home Mortgage said that dismiss all but 750 of its 7000 employees “in light of liquidity issues resulting from disruptions” in the secondary mortgage market.

“The conditions both in the secondary mortgage market as well as the national real estate market have deteriorated to the point where we have no realistic alternative,” Michael Strauss, chief executive of American Home Mortgage, said in a statement.

The company, headquartered in Melville, New York, said it was closing all but their savings and service companies “to preserve the value of its remaining assets.”

In its Web site Thursday night, the company said that it was no longer taking any loan applications.

Calls to American Home Mortgage offices and e-mails were not returned Thursday night.

While the problems facing American Home Mortgage were widely known, the speed of the company came as a surprise discovery.

Last Friday, the company stopped paying its quarterly dividend in a final effort to conserve capital. Several large investment banks issued margin calls on the debt that the company used to buy mortgage-backed securities, which includes loans and those made by other lenders, and the company said it was unable to finance mortgages.

“The disruption in credit markets in recent weeks has been unprecedented in the company’s experience has caused heavy casualties and writing their loan portfolios and security,” American Home Mortgage said in the filing of securities. This “has consequently led to a considerable margin calls regarding its credit facilities.”

American Home Mortgage is the lender of more recent origin to decrease this year and comes as other companies in the mortgage business are sounding alarms.

On Thursday, Accredited Home Lenders Holding, a San Diego-based subprime mortgage company being acquired by the fund Lone Star, said his sale was in jeopardy and that bankruptcy was possible. Its stock has lost more than a third of its value.

“Several of our competitors have recently ceased originating loans or seek protection under bankruptcy laws,” Accredited Home Lenders said public presentations. “We may suffer a similar fate.”

Meanwhile, Michael Perry, chief executive of Indymac Bancorp, another mortgage company, told employees he was doing “very significant changes” to its lending standards and higher rates charged for its business slower.

Until recently, American Home Mortgage, led by its founder and president, Michael Strauss, was one of the fastest growing and largest mortgage companies in the country.

It specialized in adjustable rate mortgages that in the early years requires borrowers to pay interest or a minimum payment that was even smaller than that. The company serves owners with high credit scores and has an extensive network of branches, mortgage brokers and correspondent banks.