To learn about investing in stocks, what subjects should I study? - W.M., Daytona Beach, Fla. To be a good investor, it's helpful to have a solid understanding of financial accounting so that you can get much more from reading companies' financial statements. Today, based in Tokyo, I'm an electronics and entertainment giant, offering a wide range of products such as LCD televisions, cameras, Blu-ray Disc players, portable audio devices, image-sensing semiconductors, batteries, data-recording systems, game systems, broadcast equipment and medical equipment. In 1979 I launched a portable stereo cassette player that was a huge hit (unlike my Betamax VCR).