Why is Expo Engineering falling/rising?

As of 05-Sep, Expo Engineering and Projects Ltd is experiencing a decline in its stock price, currently at Rs 90.11, which reflects a decrease of Rs 6.08 or 6.32%. The stock has been underperforming recently, having fallen for three consecutive days with a total decline of 8.05%. Today's trading saw the stock reach a high of Rs 102.9 and a low of Rs 88.82, indicating high volatility with an intraday range of Rs 14.08. Despite this recent downturn, the stock has shown strong performance over the longer term, with a 34.39% return over the past year and a remarkable 690.44% increase over the last three years. Positive factors include consistent quarterly results, with net sales growing by 31.27% and an increase in institutional investor participation, which has risen by 5.61%.
In the broader market context, the stock's recent performance contrasts with the Sensex, which has only gained 1.13% over the past week. While Expo Engineering has outperformed the benchmark significantly in the long term, its short-term performance has lagged, as indicated by its underperformance against the sector today by 5.91%. The stock's high volatility and recent declines may reflect market corrections or profit-taking by investors after a period of strong gains, despite the positive fundamentals and institutional interest.