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The Vickers Top Buyers & Sellers is a daily report that identifies the five companies the largest insider purchase transactions based on the dollar value of the transactions as well as the five companies the largest insider sales transactions based on the dollar value of the transactions.

Based in Switzerland, Chubb Ltd. is a global specialty insurer and reinsurer. It is the largest publicly traded property casualty insurer in the world, operating in 54 countries and territories. With a market cap of approximately $86 billion, CB shares generally are regarded as large-cap value.

Across-the-board enthusiasm that was evident before the open today has turned to mixed results at midday. As of this writing, the S&P is down slightly, the DJIA is up a bit, and gold remains higher (notably leading the pack and up more than 1%). But the Nasdaq Composite has turned lower (slightly) and the Russell 2000 is also in the red (by about 0.69%). Equities have been impacted by new data that suggests consumer sentiment in the U.S. is weakening and by Fedspeak that supports the mantra of 'deliberate' action on interest rates in the face of stubborn inflation.

Markel's primary business is property and casualty insurance, and the company focuses primarily on specialty lines, ranging from areas such as executive liability to commercial equine insurance. The acquisition of Alterra in 2013 added substantial reinsurance operations, which now account for a little less than 15% of premiums. The company uses capital generated by its insurance operations to buy noninsurance operations in diverse areas, such as bakery equipment manufacturing and residential homebuilding.