Mortgage backed securiteis (MBS) closed down 19 basis points today a 104.28 having fallen late in the day to within 3 basis of support offered by the 104.09 prior to bouncing back before the close. The 4.0 coupon MBS bonds remained in a channel between resistance offered by the 50 day moving average and support offered by the 100 day moving average. All U.S. markets will be closed tomorrow in observance of Thanksgiving. A few traders will trade Friday at a shortened session.