Etiology: Lichen planus may be found in any lining tissue â for example, the mouth, the esophagus, the eyes, ears, and the genitalia. Skin surfaces such as the scalp, arms, legs, and torso may also be involved.
Accredited investor. An accredited or sophisticated investor is an investor with a special status under financial regulation laws. The definition of an accredited investor (if any), and the consequences of being classified as such, vary between countries.
Related Terms. An investor who seeks to profit from price fluctuations rather than a change in the intrinsic value of a security or derivative product. A trader typically holds a security for periods as short as a few minutes to several weeks. See Daytrader, Swing Trader.