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However, investors should be careful not to assume that future growth is a fait accompli, or that revenues will even stabilize at current high levels. While we've often discussed how investors should interpret one-time losses, occasionally one-time gains can occur as well. Consider Alpha Pro Tech (APT), maker of a slew of protective products, from medical masks to roof underlay.

• http://www.barelkarsan.com/2010/03/revenue-spikes.html (160)