declinernoun [ C ]
uk/dɪˈklaɪnər/usSTOCK MARKET a share that falls in price over a particular period, or a company whose shares fall in price over a particular period:
The shares are the biggest decliner in U.S. trading today.
The company was the heaviest blue-chip decliner, down 17.25p to 200.75p.
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advancer
declining share