Why is Union Bank (I) falling/rising?

As of 25-Jul, Union Bank of India is experiencing a decline in its stock price, currently at Rs 136.25, which reflects a decrease of Rs 8.75 or 6.03%. Today's price summary indicates that the stock underperformed its sector by 4.14% and opened with a loss of 3.66%. After three consecutive days of gains, the stock has reversed its trend, touching an intraday low of Rs 136, which is a 6.21% drop. Despite a strong long-term performance with a year-to-date return of 13.21% and a significant 259.03% increase over the last three years, the recent decline is compounded by falling investor participation, as evidenced by a 19.15% decrease in delivery volume compared to the five-day average.
In the broader market context, Union Bank's short-term performance has been notably weaker than the benchmark, with a one-week return of -6.93% compared to the Sensex's -0.36%. This underperformance may be attributed to the stock's recent trend reversal and declining liquidity, despite its strong fundamentals, such as a robust provision coverage ratio and consistent profit growth. The increase in institutional investor participation, which has risen by 0.89% over the previous quarter, suggests that while there is confidence in the company's long-term prospects, the current market sentiment is affecting short-term price movements negatively.