BID TICK RULE is a NASD rule prohibiting a short sale transaction when the current best bid in a security is less than the previous best bid. That is, when it is on a "down-tick." The bid tick rule does not apply to the OTCBB.
RETURN ON INVESTMENT (ROI) is a profitability measure that evaluates the performance of a business. ROI can be calculated in various ways. The most common method is Net Income as a percentage of Net Book Value (total assets minus intangible assets and liabilities).
TRAIC is Trading Result After Interest and Commission.
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