The US Treasury auctioned $255 Billion(!) of debt this week (including $38
B 10-year Treasury bonds and $24
B 30-year bonds), and the credit markets barely flinched. Until Thursday night/Friday morning when 10-year yields surged to a 14 month high of more than 1.63%.
Last August, the 10-year yield was at an all-time low of ~0.50%. (Falling bond prices in this chart = rising yields.)