Net interest expense for the segment was $19.7 million, up from $2.7 million in the prior quarter. Interest income totaled $17.6 million, down from $33.5 million in the prior quarter, primarily driven by increased amortization of purchase premiums on Agency MBS. Interest expense totaled $37.4 million, up from $36.2 million in the prior quarter, primarily driven by higher interest shortfall expense from elevated prepayment activity.
Segment expenses were $17.6 million, down from $18.8 million in the prior quarter.
Correspondent Production Segment
PMT acquires newly originated loans from correspondent sellers and typically sells or securitizes the loans, resulting in current-period income and additions to its investments in MSRs related to a portion of its production. PMT’s Correspondent Production segment generated pretax income of $52.7 million, down from $86.9 million in the prior quarter.
Through its correspondent production activities, PMT acquired $56.9 billion in UPB of loans originated by nonaffiliates, up 28 percent from the prior quarter and 53 percent from the fourth quarter of 2019. Of total correspondent acquisitions, conventional conforming acquisitions from nonaffiliates totaled $38.0 billion, and government-insured or guaranteed acquisitions totaled $18.9 billion, up from $27.4 billion and $17.0 billion, respectively, in the prior quarter. Interest rate lock commitments on conventional loans totaled $39.5 billion, up from $34.4 billion in the prior quarter.
Segment revenues were $136.9 million, a 9 percent decrease from the prior quarter and included net gain on loans acquired for sale of $70.5 million, other income of $59.7 million, which primarily consists of volume-based origination fees, and net interest income of $6.7 million. Net gain on loans acquired for sale in the quarter decreased by $31.8 million from the prior quarter, as margins returned to more normalized levels. Interest income was $29.3 million, up from $26.1 million in the prior quarter, and interest expense was $22.6 million, up from $16.5 million in the prior quarter, driven by higher volumes.
Segment expenses were $84.1 million, up from $63.6 million in the prior quarter driven by the increase in activity. The weighted average fulfillment fee rate in the fourth quarter was 19 basis points, down from 20 basis points in the prior quarter.
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