Reuters Holdings Plc is buying again, and has paid $13.8m for a 79% stake in Reality Technologies Inc, a developer of personal investment software and operator of an on-line investment service: based in King of Prussia, Pennsylvania, Reality Technologies will report to Reuters NewMedia Inc in New York under its current management; the investment includes new operating capital for Reality but it is also buying a stake from an investor group led by Venrock Associates; the company’s best-known product is the personal computer package WealthBuilder by Money Magazine, of which more than 100,000 copies have been sold; the on-line investment service, Reality’s Smart Investor by Money Magazine, becomes Reuters Money Network; it was launched in November 1992 and has some 25,000 members.