Why is NRB Bearings falling/rising?

As of 26-Sep, NRB Bearings Ltd is experiencing a decline in its stock price, currently at Rs 278.45, which reflects a decrease of Rs 13.7 or 4.69%. The stock has underperformed its sector by 2.61% today and has been on a consecutive downward trend for the last two days, resulting in a total drop of 6.18%. The stock touched an intraday low of Rs 275.5, and trading volume has decreased significantly, with delivery volume falling by 42.31% compared to the 5-day average. Despite a healthy long-term growth rate in operating profit and a low Debt to EBITDA ratio, the stock's performance has been negatively impacted by flat results in the latest quarter and a high percentage of pledged promoter shares, which can exert additional downward pressure in a falling market.
In the broader market context, NRB Bearings has shown a short-term return of -2.32% over the past week, which is better than the benchmark Sensex's decline of -2.66%. However, over the past month, the stock has underperformed with a return of -2.67% compared to the Sensex's -0.45%. While the stock has generated a negative return of -9.17% over the past year, its profits have increased by 45.3%, indicating potential undervaluation. The current market conditions, combined with the company's challenges, such as the pledged shares and recent flat earnings, contribute to the downward pressure on the stock price.