Mortgage rates are driven by the bond market. Although bonds only experienced moderate, steady weakness throughout the day, mortgage rates lurched higher by an amount typically seen when the market is reacting to big, breaking news.  But there wasn't any of that sort of news on tap today--just downbeat updates that reinforced a longer timeline for geopolitical disruptions. The bigger issue for mortgage rates is that they often experience heightened volatility when they pass through the 6.25% level. Due to the underlying structure of the mortgage market, 6.25% is sort of a dead zone. If you really want to see the nuts and bolts behind that phenomenon, here's the primer. The practical result is that movement tends to be bigger when rates are rising or falling through 6.25% (or any level that ends with 0.25 or 0.75). As such, when rates began moving up from 6.125%, the slightly elevated bond market volatility made for a faster trip up to the 6.375% zone (today's MND index was revised up to 6.35% in the afternoon after ending Monday at 6.14%). This is the highest level since December 8th, 2025, though it should be noted that prior to September 2025, rates had been much higher, on average, for roughly an entire year. 

Mortgage rates moved higher on Wednesday despite only a modest increase in oil prices. The latter is currently a part of any conversation about interest rates as higher energy costs have fueled inflation expectations. Higher inflation begets higher rates, all else equal. But rates take other cues, or course. One key consideration is that of "supply." In other words, how many new dollars of debt are being issued--not just by the U.S. government, but across the entire bond market.  At present, government issuance is high and only expected to get higher. Even though congressional approval is ultimately required, armed conflict can increase expectations for future military spending. There's also uncertainty over tariff refunds which would further increase the supply of U.S. Treasuries to offset the lost revenue. Last but not least, this week brings scheduled Treasury auctions. The market knew about these ahead of time, but on some auction weeks, the results reveal an imbalance between buyers and sellers that increases momentum toward higher or lower interest rates. This week, that momentum has been generally higher. The net effect on mortgage rates is a conventional top-tier 30yr fixed that is back to February 4th levels on average. 

Today's mortgage rates are lower when compared to yesterday's average prior to 4pm ET. Later in the afternoon, multiple lenders announced improvements as the bond market rallied in response to geopolitical headlines. If we use those later, lower rates as a baseline, today's average is roughly unchanged. There were no major economic reports today--not that bonds have been too keen on reacting to econ data anyway. War-related headlines remain the biggest risk for potential volatility despite historically significant econ data on tap in the coming days. 

Mortgage rates began the day at the highest levels in a month. The move up versus Friday was only moderate, but Friday's levels were already fairly close to early Feb's highs. Oil prices continue putting upward pressure on rates, but with several caveats. It takes quite a big move in oil to motivate enough movement in the bond market to impact mortgage rates. With this morning's spike being the largest on record at the time, today certainly qualified. But over the course of the day, both oil and bonds reversed course, thus allowing the average lender to adjust rates back in line with Friday's latest levels. 

Before this morning's jobs report was released, mortgage rates were on track to end the week at their highest levels in several weeks. This was due to an ongoing mega-spike in oil prices spilling over to the bond market (higher oil = higher inflation implications, and bonds hate inflation). The jobs report saved the day, albeit in a morbid way. It was one of the weakest jobs reports in years with unemployment continuing to trend higher and the job count falling deeply into negative territory. The jobs market is the only thing as important to bonds as inflation, and job market weakness tends to push rates lower. Bonds recovered back to levels that were right in line with yesterday, thus allowing most mortgage lenders to adjust their rate offerings accordingly.