It turns out that Sony's ($SNE) bid to expand its focus into medical equipment isn't necessarily well received by investors at the struggling Japanese consumer electronic giant. After losing money on TV sales for 10 years and facing four consecutive years of net losses, Reuters reports some are worried that Sony CEO Kazuo Hirai is throwing money down a sinkhole by investing in medical equipment and other new sectors. Sony's finances aren't pristine--the article points out the company's cost of insuring its debt has doubled since Hirai became CEO in April. Among Sony's boldest investments under his tenure: An agreement to invest $643 million into Olympus, a Japanese maker of endoscopes and cameras that is struggling in the wake of a massive scandal. Story