/ˈbɛlˌwɛðər stɑk/ – Phrase
Definition: Cổ phiếu tiên phong.
A more thorough explanation: (US) (informal) a stock (=one of the equal parts into which a company’s capital is divided) that leads the market and signals the general trend in stock prices
Example: Genworth Mortgage Insurance Australia could turn out to be the ultimate bellwether stock.