Bellwether

Bellwether
- One that takes the lead or initiative
- A male sheep that leads the flock, usually bearing a bell.

Image Credits : Simone A. Bertinotti 

Usage:
- The lubricants industry serves as a bellwether of economic activity as lubricants are used in all kinds of machinery, power equipment, mining and automobiles.
- Both the Indian bellwether indices had opened lower due to negative import-export data coming out of China.

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