Shares of Yancoal Australia Ltd (YAL.AU) plummeted 7.74% during Friday's intraday trading session, following the release of the company's second-quarter production report. The sharp decline comes as investors digest the mixed results, which show increased production volumes but significantly lower realized prices for coal.

According to the report released late Thursday, Yancoal's attributable saleable coal production for the quarter ended June 30 rose to 9.4 million tonnes, up from 8.2 million tonnes in the same period last year. Run-of-mine coal production also saw an increase, reaching 17 million tonnes compared to 13.9 million tonnes a year ago. However, the average realized price per tonne dropped considerably to AU$142, down from AU$181 in the previous year, marking a 21.5% decrease.

While Yancoal stated that its full-year attributable saleable production is expected to be at the upper end of its guidance range of 35 million to 39 million tonnes, the market seems more concerned about the potential impact of lower coal prices on the company's profitability. The significant drop in share price reflects investors' worries that the increased production volumes may not be sufficient to offset the decline in coal prices, potentially squeezing margins and affecting the company's financial performance in the coming quarters.