Fluctuations in the stock price of Cullen/Frost Bankers (CFR) are typically driven by broader macroeconomic factors affecting regional banking equities, such as shifting Federal Reserve interest rate expectations, quarterly net interest margin adjustments, loan-to-deposit ratio updates, and broader financial sector sentiment. Market participants continuously rebalance regional bank shares based on these systemic variables, overall economic growth forecasts, and periodic quarterly earnings report disclosures.