The U.S. weekly average 30-year fixed mortgage rate rocketed up 10 basis points to 4.32 percent this week. Following a turbulent Monday, financial markets settled down with the 10-year Treasury yield resuming its upward march. Mortgage rates have followed. The 30-year fixed mortgage rate is up 33 basis points since the start of the year. Will higher rates break housing market momentum? It’s too early to tell for sure, but initial readings indicate housing markets are sustaining their momentum so far. The MBA reported that purchase applications are up 8 percent from a year ago in their latest Weekly Mortgage Applications Survey.

The Federal Reserve did not hike rates this week, but the market views future hikes as a near certainty. The expectation of future Fed rate hikes and increased borrowing by the U.S. Treasury is putting upward pressure on interest rates. The 30-year fixed rate mortgage is up over a quarter of a percentage point (27 basis points) from the first week of the year. 30-year fixed mortgage rates have increased for four consecutive weeks and are now slightly above where they were last year at this time.

Rates keep climbing. The 10-year Treasury yield reached its highest point since 2014 reflecting expectations of broad-based economic growth. Mortgage rates, in turn, followed the surge in Treasury yields. The 30-year fixed rate mortgage jumped 11 basis points to 4.15 percent, its highest level since March of last year.

The release of the December existing home sales data confirms that 2017 was the best year for home sales in over a decade. Will 2018 home sales outpace 2017? Homebuyer affordability will be a challenge, with mortgage rates moving higher and robust house price gains across the country. The FHFA reported that house prices increased 6.5 percent from November 2016 to November 2017, with all regions showing positive 12-month changes.