Warren Buffett is considered by many as one of the greatest investors of all time. The longevity of his success is remarkable, starting as a public investor in the 1950s after establishing his own investment partnership.Buffett typically holds his equity positions a long time, so it can create quite a stir when he starts selling a stock, especially one of Berkshire’s biggest holdings. Buffett did just that when he started selling Apple (AAPL -0.34%) shares in the fourth quarter of 2023. What does that mean to apple stock investors ?