My home state being West Virginia, I know a thing or two about coal.
The expression “canary in the coal mine” is metaphorical today and refers to an early warning, a sign of trouble ahead.
But back in the day, miners would bring canaries into the mine shafts with them. If the bird stopped singing and dropped dead, it warned the miners of the presence of poisonous gas.
Well, back in January, I saw the canary in the coal mine when Russian stocks started to sell off aggressively.
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