Standard & Poor’s lowered FCA’s debt rating.

S&P; said it has lowered its rating on the subordinated debt of Irvine-based Financial Corp. of America to B-minus from BB-minus as a result of FCA’s announcement last week that it expects to report losses of between $500 million and $700 million for 1984. Meanwhile, FCA’s thrift subsidiary, American Savings & Loan Assn., lost $18 million in deposits Thursday, bringing to nearly $160 million the total outflow during the past four days. A company spokesman noted, however, that the outflows have declined each day this week.