The Nifty PSU Bank index is approaching a make-or-break zone near its all-time high resistance of 5375. If there is a breakout above this level, it could lead to a fresh rally in the index and PSU stocks. However, failing to do so in the coming weeks may result in profit booking or consolidation. The Nifty Bank index has historically performed well in October and could outperform the benchmark indices. Traders should watch out for levels around 44000-43600 as a strong base for the short term.