Canadian National Railway's stock plummeted 5.18% during intraday trading on Wednesday, following the release of its first-quarter financial results.

The railway company reported Q1 adjusted earnings of CA$1.80 per diluted share, down from CA$1.85 in the same period last year. Revenue for the quarter also declined to CA$4.38 billion from CA$4.40 billion a year earlier.

While the results met analyst expectations, the year-over-year declines in both earnings per share and revenue appear to have concerned investors, leading to the significant sell-off during the trading session.