Why is SML ISUZU falling/rising?

As of 23-Oct, SML ISUZU Ltd's stock price is currently at 2,824.90, reflecting a decline of 131.0 points, or 4.43%. The stock has underperformed its sector today by 4.08%, with an intraday low of Rs 2812.7, indicating a significant drop. Despite a strong long-term performance with a year-to-date return of 100.83% and a one-year return of 64.05%, the stock has faced a downturn recently, with a 17.34% decline over the past month. The company's healthy long-term growth, evidenced by a 33.17% annual increase in net sales and a 31.33% rise in operating profit, has not been sufficient to counteract the recent negative sentiment, particularly following flat results reported on September 25.
In the broader market context, SML ISUZU's recent performance contrasts sharply with the Sensex, which has gained 1.30% over the past week and 2.99% over the past month. This divergence highlights the stock's struggles despite its historical outperformance over the last three years, where it has consistently generated returns exceeding those of the BSE500. The increase in institutional investor participation, which has risen by 0.75% in the last quarter, suggests a level of confidence in the company's fundamentals; however, the recent price movement indicates that broader market trends and specific company challenges are currently weighing heavily on investor sentiment.