Rising interest rates apparently haven’t dampened borrower demand for adjustable-rate mortgages. A snapshot of the securitization market, in fact, reveals that ARMs retained their dominant place in the market. According to data compiled by the Inside Mortgage Finance MBS Database, ARMs accounted for 76.6 percent of the total $123.28 billion in new subprime loans securitized during the first quarter of 2006. That was up from the 74.0 percent market share that ARMs claimed in…