The S&P CoreLogic Case-Shiller 20-City Home Price Index experienced a 4.1% year-over-year increase in March, down from the 4.5% growth observed in February. This rise contrasts significantly with expectations of a 4.5% increase, marking the slowest growth since September 2023. This deceleration occurred even as other data indicated lower mortgage rates and recent measures pointed to a limited housing supply, possibly suggesting diminished purchasing power among homebuyers.