Warren Buffett's Berkshire Hathaway continued selling off more of its HP Inc. shares this week at a loss and dropped its stake below 10% of the maker of printers and computers. Berkshire sold another 3 million shares Tuesday. HP’s shares have been selling around $26 dollars this week after taking a sharp fall of nearly 14% over the past month. The stock of the Palo Alto, California-based company was selling in the mid $30s last spring when Berkshire first bought it. It’s still not clear whether Buffett plans to unload all of Berkshire’s HP shares. But it's looking more like the HP investment will wind up similar to Buffett's ill-fated IBM purchases more than a decade ago instead of like his wildly successful Apple stake.