Why is T N Merc. Bank falling/rising?

As of 14-Aug, Tamilnad Mercantile Bank Ltd's stock price is currently at 428.50, reflecting a decrease of 1.75, or 0.41%. The stock has underperformed its sector today by 0.7%, and it is trading below its 5-day, 20-day, 50-day, 100-day, and 200-day moving averages. Over the past week, the stock has declined by 0.82%, and it has also shown a negative return of 3.81% over the past month. Despite a rise in delivery volume by 21.98% against the 5-day average, the stock's performance remains concerning, especially given its year-to-date return of -5.30% compared to a positive 3.15% for the benchmark Sensex. The bank's high Capital Adequacy Ratio of 25.68% and attractive valuation metrics, such as a 0.7 Price to Book Value and a PEG ratio of 0.6, suggest potential value; however, flat results in recent quarters, low operating profit margins, and negligible domestic mutual fund interest indicate underlying weaknesses that may be contributing to the stock's decline.
In the broader market context, Tamilnad Mercantile Bank's short-term performance has lagged behind the Sensex, which has only seen a minor decline of 0.03% over the past week. The bank's negative returns over various periods, including a 4.57% drop over the last year, further highlight its struggles compared to the benchmark's positive performance. The stock's underperformance in both the short and long term, coupled with a lack of confidence from domestic mutual funds, suggests that investor sentiment may be cautious, leading to the stock's current downward trend.