Why is International Ge falling/rising?

As of 16-Sep, International Gemmological Institute (India) Ltd is experiencing a decline in its stock price, currently at 373.40, which reflects a decrease of 2.2 points or 0.59%. The stock has underperformed its sector by 0.3% today and has shown a trend reversal after two consecutive days of gains. Despite a strong long-term fundamental strength indicated by an average Return on Equity (ROE) of 40.21% and a low Debt to Equity ratio, the stock's year-to-date performance remains significantly negative at -32.53%. Additionally, the delivery volume has dropped by 47.93% compared to the five-day average, suggesting a decrease in investor participation.
In the broader market context, the stock has outperformed the benchmark Sensex over the past week and month, with returns of 7.04% and 9.81% respectively, while the Sensex has gained only 1.58% and 2.21% in the same periods. However, the stock's year-to-date performance starkly contrasts with the Sensex's positive return of 5.43%, indicating a significant underperformance in the longer term. This combination of short-term gains against a backdrop of long-term struggles may contribute to the current volatility in the stock price.