One pundit became more pessimistic on the company's future earnings potential.HP (HPQ -3.91%) wasn't exactly the belle of the stock market ball on Friday. Although the company had little of its own news to report that day, its shares were shaken by a new research note by an analyst. This led to an outflow of investors from the stock, leaving it nearly 4% down in price at market close. That was a notably more pronounced decline than the 0.1% dip of the S&P 500 index.Too dependent on EPS-boosting stock buybac ...