Why is Tata Motors falling/rising?

As of 25-Sep, Tata Motors Ltd. is experiencing a decline in its stock price, currently at Rs 664.25, reflecting a decrease of Rs 18.5 or 2.71%. The stock has underperformed its sector by 1.73% today and has been on a downward trend for the last two days, accumulating a total loss of 5.31%. Over the past week, Tata Motors has seen a return of -6.58%, while its performance over the last month is also negative at -3.27%. Despite a healthy long-term growth rate in net sales and operating profit, the stock has faced significant challenges, including a year-over-year return of -31.06% and a decline in profits by 39.8%. The recent financial results indicate a substantial fall in profit before tax and net sales compared to previous quarters, contributing to the stock's negative movement.
In the broader market context, Tata Motors has underperformed relative to the benchmark, with the Sensex showing a decline of only 2.23% over the past week. The stock's performance has been notably weaker than the market, particularly over the past year, where it has fallen significantly more than the BSE500's negative return of -5.88%. While there is a rising investor participation indicated by an increase in delivery volume, the overall sentiment remains cautious due to the stock's poor recent performance and high institutional holdings, which suggest that larger investors are also wary of the stock's current valuation and profitability issues.