The recent fluctuations in FNB's share price could be driven by a mix of factors like market speculation, sector performance, or broader economic indicators. Sometimes even changes in interest rates can significantly impact financial institutions. As for FNB's performance during times of economic uncertainty, banks can be quite resilient, but they might face challenges like reduced loan growth or increased defaults. It's worth checking recent earnings reports or news for any announcements that might have influenced the stock. Keep an eye on industry trends and economic forecasts, as they often provide clues about future performance.