Countrywide Credit Industries said strong originations pushed its  mortgage servicing portfolio to $137 billion in   February, a gain of 21% from a year earlier.   
Countrywide funded $3.4 billion of loans in the month, up from $1.7  billion last February. Fixed-rate loans accounted for 86% of the loan   production. Mortgages to buy homes totaled $1.5 billion, up slightly from   $1.4 billion in February 1995.     
  
The Pasadena, Calif.-based lender remains the nation's largest mortgage  servicer but will be displaced from the top spot when Norwest Mortgage   Corp., Des Moines completes its acquisition of Prudential Home Mortgage   later this year.     
The delinquency rate on loans in the Countrywide servicing portfolio  climbed to 3.2%, from 2.51% a year earlier. The average delinquency rate   for all outstanding loans, according to the Mortgage Bankers Association of   America, is 4.24%.     
  
Countrywide's foreclosure rate also increased - to 0.49% from 0.29%.
Prepayments in the company's servicing portfolio were at an annual rate  of 15% during its fourth fiscal quarter, up from 13% the preceding quarter. 
The portfolio's weighted average coupon, an indicator of vulnerability  to prepayments, was 7.8% in February, up slightly from a   year ago.   
  
Daily applications increased 20% from the January level, said Angelo R.  Mozilo, vice chairman, in a prepared statement. 
Separately, Phoenix-based Homeplex Mortgage Investments Corp., a real  estate investment trust, reported income of $1.1 million, or 11 cents per   share, for 1995. That is up from a $4.5-million loss in 1994.   
Income from real estate lending and from its mortgage residual interests  lent to the company's profits, according to a statement of its earnings. 
The company continues to explore other business strategies, the  statement said, including possibly terminating its status as a real estate   investment trust and the purchase of non-REIT operating companies. Such   trusts do not pay corporate taxes on their earnings provided they pass most   of the earnings onto their shareholders.       
  
During the quarter ended Dec. 31, Homeplex earned $242,000, or 2 cents a  share. That is in contrast to a loss of $3.16 million in the quarter a year   earlier, or 33 cents a share.