After a blanket of brown haze hovered over Beijing for two weeks in January, calls to cut back on fireworks during this year's Spring Festival celebrations have increased, making a dent on the stock performance of companies in the sector.

The share prices of fireworks makers usually shoot up before the Lunar New Year, as sales usually increase in the weeks surrounding Spring Festival.

However, this year, the performance of those companies may be below investors' expectations, analysts said.