Inverting recent trends and moving away from historical lows, the 30-year, fixed-mortgage rate increased 27 basis points to 4.34%, according to the Zillow Mortgage Marketplace weekly update. This is the highest rate in four months and up from a record low of 4.07% set last week. Zillow chief economist Stan Humphries attributed the jump to the Federal Reserve's quantitative easing, set in motion earlier this month. "Not surprisingly, higher yields on 10-year treasury bonds – up more than 30 basis points in the past month – are creating ripples in the mortgage markets," Humphries said. "While the Federal Reserve expected a second round of quantitative easing to push yields down, or at least keep them low, the opposite appears to be happening." Zillow said the current 15-year, fixed average rate is 3.75% and the rate for a 5-1 adjustable rate mortgage is 3.14%. That type of mortgage maintains a steady rate for five years and then is adjusted annually thereafter. Regionally, 30-year rates vary, but the majority of states witnessed a drastic inflation. New York's average rate rose to 4.34% last week from 3.98% prior. Rates in Florida also rose substantially to 4.25% from 4.02% the previous week, while California's rate increased to 4.36% from 4.04%, and Texas saw its average rate jump to 4.31% from 4.11%. Pennsylvania's current rate of 4.41% is up from 4.08% last week. Colorado's average rate for a 30-year fixed mortgage rose to 4.37% from 4.10% at Nov. 9. Washington's 30-year FRM increased to 4.32%. Zillow bases its averages on real-time mortgage quotes from lenders registered with the company. The national average comes from thousands of daily quotes by anonymous borrowers through the Seattle-based company's website. Write to Christine Ricciardi.