Dalal Street is witnessing a historic bull run this week, with both the Sensex and Bank Nifty smashing through their previous all-time highs. The massive surge is being largely driven by the banking and financial sectors, following a wave of better-than-expected Q4 earnings reports from major private and public sector banks. Analysts point to strong credit growth, controlled non-performing assets (NPAs), and a massive influx of Foreign Institutional Investor (FII) capital as the primary catalysts. Active derivative traders are capitalizing on the high volatility, while long-term investors are seeing substantial portfolio growth. Market experts predict this momentum could carry forward into the upcoming weekly expiry if global cues remain supportive.