Dr. Leslie Griesdorf, a semi-retired professional who began investing after he retired from his career as a dentist, says he often gives investing advice to his friends and family when asked. He’s happy to share what he’s learned since he started trading in the stock market, and his loved ones appreciate his knack for numbers. When he’s not working on his portfolio, Dr. Griesdorf enjoys collecting music, learning about history and relaxing with his family.