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"pull and bear" sounds to me like a torturous translation of a foreign expression that means "ready to wear". (Take it and wear it (as is).)

Spanish: tirar y llevar


just guessing, but it may be a literal translation from spanish "tiro y arrastre".
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Well done “anonymous”, you gave the right answer after five years!

It’s a play on words referring to financial markets : a bull attacks down to up, so does a bullish market, whose trend is climbing.

A bear is supposed to attack from top to bottom, hence a bearish market has a decreasing trend.