Downside
The dollar amount by which the market or a stock has the potential to fall.
Investopedia Commentary
You might hear someone say that the downside on stock XYZ is $10. What that means is that the stock could fall by this amount if things got bad. Downside is usually gauged by either fundamental or technical factors.
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See also: Bear, Downside Risk, Fundamental Analysis, Risk, Secondary Market, Technical Analysis, Upside, Upside/Downside Ratio
Also spelled: down side, down-side