Union Pacific shares have lost about 3.4% since the beginning of the year versus the S&P 500's gain of 13.8%. Over the last four quarters, the company has surpassed consensus EPS estimates four times. What's Next for Union Pacific? Empirical research shows a strong correlation between near-term stock movements and trends in earnings estimate revisions. Investors can track such revisions by themselves or rely on a tried-and-tested rating tool like the Zacks Rank, which has an impressive track record of harne ...