HFA voluntary prepayment ratios to generic counterparts continued to move up on 2.5s and 3s, and eased on higher coupons in the September. Tier 3 ratios continued to be pushed up more notably by UT speeds. These ratios for new production Tier 1 remain in the single digits to teens percent, and Tier 2 in the 20s to 30s percent. Tier 3 ratios are in the 60s to 80s percent in aggregate.

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