The official S&P Cotality Case-Shiller release for March 2026 (press.spglobal.com) and the CalculatedRisk summary confirm that home price growth slowed in March 2026, with the 20-City Composite showing +0.8% YoY (consistent with the claimed 0.83%, which rounds to 0.8%). CalculatedRisk reports a national MoM decline (-0.22% SA), and TradingEconomics confirms the 20-City YoY at 0.8%, easing from 0.9% in February. The specific -0.16% MoM 20-City figure could not be directly verified in the abstracted sources but is consistent with the broader pattern of declines. The 'weakest since July 2023' framing aligns with the documented deceleration trend.