Bonds closed well into positive territory after a complete reversal of the morning's losses. UMBS 5.0 finished at 97.61, up 27 basis points from Wednesday's close — the intraday move from the morning low of 97.10 to the EOD close was nearly 50 basis points.

The catalyst for the afternoon rally was a post-1pm headline suggesting a draft Iran nuclear agreement was imminent. The framing was loose — the core sticking point about uranium leaving the country wasn't listed as resolved — but the bond market responded immediately. Oil prices dropped in lockstep with bond yields, confirming the geopolitical read-through: lower oil expectations equal lower inflation expectations equal better bond prices. Whether the peace talks actually close is a separate question, but today's price action shows how sensitive this market is to headline risk in either direction.

For borrowers, today ended better than it started by a wide margin. Rate sheets improved through the afternoon as lenders absorbed the bond recovery. Anyone who locked this morning locked into a slightly worse rate than the EOD offered — but anyone still floating from Tuesday is in meaningfully better shape than where they started the week.

— David Burson, NetRate Mortgage