21.   Steady yields are a boon for mortgage investors because they make it easier to forecast how fast the underlying loans will be repaid.

22.   Still, mortgage investors are on the lookout for a resumption of the rally in the coming weeks.

23.   Still, mortgage investors are on the lookout for a resumption of the rally in coming weeks.

24.   That may trigger a pick-up in refinancings, the bane of mortgage bond investors.

25.   The drop in rates has some mortgage bond investors concerned that a few more homeowners will take out new loans or repay their old ones early by refinancing.

26.   The decline in rates has some mortgage bond investors concerned that a few more homeowners will take out new loans or repay their old ones early by refinancing.

27.   Yet fluctuations in rates may threaten the returns of mortgage bond investors.