Why is SML ISUZU falling/rising?

As of 04-September, SML ISUZU Ltd's stock price is currently at Rs 3,794.10, reflecting a decline of Rs 159.8, or 4.04%. Today's price action saw the stock open with a gain of 2.16% but subsequently fell to an intraday low of Rs 3,785, indicating significant volatility. The stock has underperformed its sector by 0.58% today, and while it has shown impressive long-term growth with a year-to-date increase of 169.74%, it has experienced a 1-week decline of 11.40%. Positive factors include healthy long-term growth in net sales and operating profit, as well as increased participation from institutional investors, which may provide some support for the stock despite its current downward movement.
In the broader market context, SML ISUZU's recent performance contrasts sharply with the benchmark Sensex, which has gained 0.80% over the past week. The auto-trucks sector, in which SML ISUZU operates, has seen a decline of 3.45%, contributing to the stock's struggles. Additionally, falling investor participation, as indicated by a significant drop in delivery volume, suggests waning interest among retail investors. Despite the stock's strong historical performance and consistent returns over the last three years, the current negative sentiment and sector-wide challenges are likely influencing the recent price decline.