A measure of consumer confidence shot to its highest level in more than 15 years in December as Americans saw more strength ahead in business conditions, stock prices and the job market following the election of Donald J. Trump as president.

A separate report showed that house prices continued their steady recovery in October, although a spike in borrowing costs after Election Day could present a headwind to sustained home value gains.

The Conference Board said Tuesday that its Consumer Confidence Index rose to 113.7 this month from an upwardly revised 109.4 in November. That topped estimates in a Reuters poll for a reading of 109.0, and was the highest since August 2001.

Lynn Franco, director of economic indicators at The Conference Board, said in a statement that the gain in confidence was entirely because of rising expectations, as consumers’ assessments of current conditions dipped, and was led by surging optimism among older Americans. The private economic forecasting group’s Expectations Index hit its highest mark since December 2003.