This commentary originally appeared on Real Money Pro on Nov. 15 at 11:00 a.m. EST.Owning (or selling) a security is not synonymous with respecting (or not respecting) management and its past corporate accomplishments. If we distill owning equity to only one factor -- to me, is whether the forward-looking reward relative to risk in a company's share price is attractive. Case in point: Berkshire Hathaway ( BRK.A)/ ( BRK.B), which I sold yesterday. I, as most other professionals, worship at the altar of Warren Buffett. I have written voluminously about Berkshire Hathaway -- sometimes critical but often positive. I have studied Berkshire Hathaway over the years and have carefully read Whitney Tilson's comprehensive research and analysis on Berkshire. I even endorsed the back of Jeff Matthews' terrific book, Pilgrimage to Warren Buffett's Omaha. One can safely conclude that Buffett is the single greatest stock investor of all time, and his net worth reflects his past achievements. He also seems to be a genuinely great human being through his personal charitable efforts (his massive commitment to the Bill and Melinda Gates Foundation), and his arm-twisting of fellow billionaires in " The Giving Pledge" is an amazing accomplishment in its scope and likely ultimate impact. But the shares no longer have the appeal that they once did for several reasons, and I have sold my long position in Berkshire Hathaway.