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Disciplined Growth Investors trimmed its position in InterDigital after the stock’s continued strong performance over the past year. The company develops wireless technologies used in smartphones and ...

ROI is an important measure of an investment's performance but it has some drawbacks. Andrew Beattie was part of the original editorial team at Investopedia and has spent twenty years writing on a ...

Psychotherapy, also called talk therapy or usually just "therapy," is a form of treatment aimed at relieving emotional distress and mental health problems. Provided by any of a variety of trained ...