Why is Tata Motors falling/rising?

As of 17-Sep, Tata Motors Ltd. is currently priced at 719.15, reflecting an increase of 5.5, or 0.77%. The stock has been gaining for the last two days, with a total return of 0.91% during this period. Despite this recent uptick, the stock has underperformed its sector by 0.27%. In terms of longer-term performance, Tata Motors has seen a return of -26.24% over the past year, significantly worse than the broader market's decline of -0.46%. The company's net sales have shown a healthy long-term growth rate of 13.59%, but recent quarterly results indicate a concerning decline in profits and sales, which may weigh on investor sentiment.
In the broader market context, Tata Motors' short-term performance of +1.43% over the past week is slightly below the Sensex's gain of +1.56%. While the stock has been trading above its moving averages, indicating some positive momentum, the overall year-to-date performance remains negative at -2.91%, contrasting with the Sensex's positive return of +5.83%. High institutional holdings at 34.42% suggest that knowledgeable investors are backing the stock, yet the significant drop in profits and net sales compared to previous quarters raises concerns about its future performance.