RIVERSIDE, Calif. - The proportion of home loans made at adjustable  rates continued to decline in the first quarter of 1995 as the gap between   long-term and short-term interest rates narrowed, according to TRW Redi   Property Data.     
In a study of lending activity in 29 metropolitan counties around the  country, TRW Redi, a nationwide real estate information company, found that   adjustable-rate mortgages accounted for 37% of originations in March. This   is a much lower number than the 44% reported by the Federal Housing Finance   Board for March.       
  
TRW said its figure was down from 43% in December of last year.  Borrowers began flocking to ARMs in the second quarter of 1994 as rising   rates made fixed-rate mortgages less attractive. But the difference between   long-term and short-term rates has narrowed recently, causing ARMs to lose   ground to fixed-rate loans.       
ARMs are most popular in the Western states, particularly California,  where in March they accounted for 54% of originations in the San Francisco   Bay area and 42% in the Los Angeles metropolitan region. In contrast, the   share of ARMs in total originations stood at 12% in South Florida, 22% in   the Dallas-Houston area, and 26% in Hartford, Conn.