It's time to take the pulse of the market, looking at the top 50 insiders buying and selling shares over the past 30 days.

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*All data courtesy of Insider-Monitor.com and sec.gov.

The past 30 days were heavily tilted toward insider selling of stock, with 12 times more sold than bought. Selling has now outpaced buying for four months and totals $41.5 billion, compared to $4.2 billion of insider buying. While selling transactions did dominate the market over the past 30 days, one super investor was gobbling up 1.3 million shares of DaVita HealthCare Partners (NYSE:DVA).

Warren Buffett's $2.2 billion investment
That's right -- investing legend Warren Buffet increased his stake in DaVita HealthCare Partners for the second month in a row to approximately 36.5 million shares, or 17% of DaVita's outstanding shares. Buffett and Berkshire's interest in DaVita likely stems from the company's promising outlook and excellent returns on capital. The company returns about 10% on invested capital and generates free cash flow equal to 8% of its market capitalization.  

In the following video, Motley Fool analyst Blake Bos discusses the recent transactions and what was driving some of the buying in DaVita. He'll also break down total buying and selling over the past month and let investors know whether they should interpret the huge amounts of insider selling as a sign of a looming market collapse or disregard it as noise.

 

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Blake Bos has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.