The Financial Post reports in its Wednesday, Jan. 29, edition that Canadian National Railway on Tuesday beat analyst expectations for adjusted profit and said it would buy back up to 16 million common shares over the next one year. A Reuters dispatch to the Post reports that Canada's largest railroad operator has been ramping up its services to clear delayed shipments from a crippling eight-day strike in November. However, CN's operating ratio, a closely watched productivity metric that measures expenses as a percentage of revenue, rose to 66 per cent from 61.9 per cent a year earlier. The lower the ratio, the more efficient a railroad. Net income fell to $873-million or $1.22 per share in the quarter ended Dec. 31, from $1.14-billion or $1.56 per share a year earlier. Revenue fell to $3.58-billion from $3.8-billion, above expectations of $3.52-billion.