Why is Hindustan Zinc falling/rising?

As of 13-Aug, Hindustan Zinc Ltd's stock price is currently at Rs 429.85, reflecting an increase of Rs 6.4 or 1.51%. The stock has been gaining for the last two days, with a total return of 3.04% during this period. It has also shown a positive performance over the past week with a return of 2.36%, while its one-month return is slightly positive at 1.24%. Despite these short-term gains, the stock has underperformed significantly over the past year, with a decline of 26.69%. The company has a high dividend yield of 4.49%, which may attract some investors, but it also faces challenges such as a low debt-to-equity ratio and a high percentage of pledged promoter shares, which can exert downward pressure on the stock price.
In the broader market context, while the Sensex has remained relatively flat with a return of -0.01% over the past week, Hindustan Zinc's short-term performance has outpaced this benchmark. However, the stock's long-term performance has been disappointing, with a year-to-date return of -3.12% compared to the Sensex's positive return of 3.07%. The company's operating profit has declined at an annual rate of -2.83% over the last five years, and recent quarterly results show a significant drop in net sales and profit after tax. This combination of strong short-term gains against a backdrop of poor long-term growth and high valuations compared to peers suggests that while the stock may be rising in the short term, underlying issues could pose risks for sustained performance.