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Berkshire Hathaway's (BRK.A) (BRK.B) new CEO, Greg Abel, recently disclosed that he would use all the after-tax proceeds from his salary to buy his own company's stock while he leads the firm, and he got the ball rolling with an initial purchase of $15.3 million of BRK.A. Abel will certainly have a great deal of incentive to attempt to boost the share price. However, given his unproven investment record, a questionable decision coming out of the gate by the new CEO, Berkshire's unimpressive fourth-quarter financial results, an assessment of Berkshire by a veteran, prominent investor, and a key long-term threat to Berkshire, I don't recommend that investors buy the shares at this point.