In the latest short interest report on November 2, the data indicated that Illinois Tool Worksâ (ITW) short interest was at its highest point of 2018. According to the report, ITWâs short interest was 1.56% of its outstanding shares compared to 1.27% on October 15. The increase in its short interest suggests a rise in negative sentiments toward the stock. As a result, its short interest ratio is ~3.05x, indicating that it would require three days to cover all of the short positions in the stock.