Why is Grill Splendour falling/rising?

As of 17-Sep, Grill Splendour Services Ltd is experiencing a price increase, with its current price at 130.80, reflecting a rise of 5.8 or 4.64%. The stock has shown strong performance today, outperforming its sector by 4.48%. Additionally, it is trading above its 5-day, 20-day, 50-day, 100-day, and 200-day moving averages, indicating a positive trend. Over the past week and month, the stock has gained 8.10%, significantly outperforming the Sensex, which rose by only 1.43% and 2.84%, respectively. However, there has been a notable decline in investor participation, with delivery volume dropping by 54.55% compared to the 5-day average, which may raise concerns about the sustainability of the stock's upward movement.
In the broader market context, Grill Splendour's year-to-date return of 57.40% far exceeds the Sensex's 7.13%, showcasing its strong performance relative to the market. The stock's one-year return of 56.46% also contrasts sharply with the Sensex's decline of 0.35%, further emphasizing its resilience. Despite the recent drop in delivery volume, the overall liquidity remains adequate for trading, suggesting that while there may be some short-term volatility, the stock's long-term outlook appears robust given its strong historical performance against the benchmark.