The Globe and Mail reports in its Friday, Oct. 25, edition that between Sept. 30 and Oct. 15, short sales of Canadian Natural Resources stock rose by just over 19.7 million shares to just over 39.8 million shares. The Globe's regular guest columnist Ted Dixon writes in the Who Is Buying and Selling column that as short selling increased, insider selling fell. Over the past 90 days, senior officers and directors have been net sellers of 8,022 shares in the public market, well below the rolling 90-day average over the past four years of just over 1.1 million shares. The divergence between short and insider sales may signal a heightened risk of a short squeeze. The Globe reported on Oct. 8 that RBC Dominion Securities analyst Greg Pardy rated Canadian Natural "outperform." The shares could then be had for $49.81. The Globe reported on Oct. 9 that Desjardins Securities analyst Chris MacCulloch had upgraded Canadian Natural to "buy" from "hold." The shares could then be had for $49.61. The Globe reported on Oct. 10 that CIBC World Markets analyst Dennis Fong had reaffirmed his "outperformer" recommendation for Canadian Natural, which could then be had for $51.47.