As the saying goes, there are many possible reasons for an insider to sell a stock, but only one reason to buy -- they expect to make money. So let's look at two noteworthy recent insider buys.

At Sensus Healthcare, a filing with the SEC revealed that on Monday, Eric Sachetta purchased 64,841 shares of SRTS, for a cost of $3.48 each, for a total investment of $225,616. Bargain hunters have the opportunity to pick up SRTS at a price even lower than Sachetta did, with shares changing hands as low as $3.14 in trading on Thursday which is 9.7% under Sachetta's purchase price. Sensus Healthcare is trading off about 0.9% on the day Thursday. Before this latest buy, Sachetta purchased SRTS on 5 other occasions during the past twelve months, for a total investment of $293,689 at an average of $3.25 per share.

And at Dycom Industries, there was insider buying on Tuesday, by David Joseph Fallon who bought 700 shares for a cost of $286.92 each, for a total investment of $200,844. This buy marks the first one filed by Fallon in the past twelve months. Dycom Industries is trading off about 0.4% on the day Thursday. So far Fallon is in the green, up about 4.4% on their purchase based on today's trading high of $299.61.