China Yuchai International (CYD) Historical Volatility

Tracking CYD historical volatility helps you see how much China Yuchai International's stock price has actually moved, giving you a baseline for whether option premiums look fair, cheap, or expensive. While implied volatility shows what the market expects, CYD's HV, also known as realized volatility, shows what actually happened. Use our scanner to monitor CYD 30 day historical volatility alongside longer lookback windows and spot the moments when realized and implied diverge.

Historical volatility is the annualized standard deviation of a stock's past returns, typically measured over rolling windows like 10, 20, 30, or 60 days. CYD's 30 day historical volatility, or CYD HV, is one of the most widely watched readings because it balances responsiveness with stability. Comparing CYD's HV to its implied volatility reveals the volatility risk premium. When IV sits well above HV, options are pricing in more movement than the stock has actually delivered, giving option sellers an edge. When HV runs hot relative to IV, options are pricing in less movement than the stock has delivered, and buyers may be underpaying for it.

China Yuchai International Limited, through its subsidiaries, manufactures, assembles, and sells diesel and natural gas engines for trucks, buses and passenger vehicles, marine, industrial, and agriculture applications in the People's Republic of China and internationally. It operates through two segments, Yuchai and HLGE. The company provides diesel engines comprising 4- and 6-cylinder diesel engines, high horsepower marine diesel engines, and power generator engines, as well as natural gas engines, diesel power generators, diesel engine parts, and remanufacturing services; and generator sets, as well as plug in hybrid engines, range extenders, power generation powertrains, hybrid powertrains, integrated electric drive axel powertrains, and fuel cell systems.