VANCOUVER - OSI Geospatial Inc. (TSXV:OSI) stock experienced a double-digit drop Monday after the company said its U.S. research and development operations will suffer a 50 per cent decline in revenue in fiscal 2011.On the TSX Venture market, OSI stock was down a penny, or 11.11 per cent, at eight cents, at midday.The decrease in U.S. revenue, … [Read more...]