The proportion of non-performing loans held by Spain's large banks, regional savings banks, or "cajas," and other lending institutions hit a new record high of 11.38 percent in November.
Based on provisional data published Friday by Spain's central bank, those financial institutions' bad loans were valued at 191.6 billion euros (some $256.2 billion) at the close of November.
The latest monthly increase - up from 11.23 percent in October - means the bad-loan ratio has climbed for 17 consecutive months dating back to July 2011.
The value of Spanish banks' non-performing loans, those in arrears for at least three months, has climbed from 134.2 billion euros to 191.6 billion euros, or nearly 43 percent, over the past 12 months.
In November 2011, the bad-loan ratio stood at 7.51 percent, more than three percentage points lower than the current level.
The Spanish financial system had a total loan portfolio valued at 1.68 trillion euros in November, virtually unchanged from the previous month, the central bank said. EFE