The ups and downs seen in rate-indicative bond yields over the course of the holiday-shortened week netted out to relative stability in average weekly mortgage rates, according to Freddie Mac's primary market survey."Rates really bounced around...hour to hour, minute to minute" during the week, Frank Nothaft, chief economist told this publication. But because the survey is an average over a few days, "rates have smoothed out," he said.He noted that the week is unusual both because it is shortened by the holiday and because market activity has been relatively thin.The survey shows that during the week ending Nov. 24 the average rate for a 30-year fixed rate mortgage was 4.40%, up just slightly from the previous week's 4.39%; the average 15-year FRM rate inched up to 3.77% from 3.76%; the average rate five-year Treasury-indexed adjustable-rate mortgage rose somewhat more notably to 3.45% from 3.40%; while the average one-year Treasury ARM rate dropped a bit to 3.23% from 3.26%.Average points in the latest week were as follows: 0.8 for 30-year FRMs, 0.7 for 15-year FRMs, and 0.6 for five-year Treasury hybrids as well as for one-year Treasury ARMs.Average rates are still relatively low compared to a year ago when the 30-year rate was 4.78%, the 15-year rate was 4.29%, the five-year Treasury hybrid rate was 4.18% and the one-year Treasury ARM rate was 4.35%.