The document discusses the historic price development of gum rosin, comparing supply and demand over time. It analyzes three phases from the 1980s to present and how speculation has impacted price volatility. The current market situation sees lower stock levels leading to higher volatility, as growing Chinese demand and external speculation activities influence prices. It recommends purchasing monthly to cover needs rather than speculating, and that production managers should openly share stock situations and purchase according to short-term market guidance rather than long-term fixed contracts. In conclusion, price volatility will likely increase in other commodities, so following the market and avoiding losses from speculation through consistent risk management is important.