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.

On Tuesday, First Business Financial Services's Director, Gerald L.

Kilcoyne, made a $100,300 purchase of FBIZ, buying 6,800 shares at a cost of $14.75 a piece.

First Business Financial Services is trading up about 3.9% on the day Thursday.

And on Monday, Director Alan L.

Tyson bought $77,184 worth of New Residential Investment, buying 10,000 shares at a cost of $7.72 a piece.

Before this latest buy, Tyson made one other purchase in the past year, buying $50,100 shares at a cost of $5.01 each.

New Residential Investment is trading off about 1.9% on the day Thursday.

So far Tyson is in the green, up about 4.9% on their buy based on today's trading high of $8.10.