The Globe and Mail reports in its Tuesday edition that investors need to be mindful of the Canada Revenue Agency's superficial loss rule that prohibits repurchasing a security, such as a stock or fund, within 30 days following a tax-loss sale. In a Globe special, Shirley Won writes that the rule, which applies to affiliated people such as a spouse, also precludes buying the same security 30 days before the sale. That effectively becomes a 61-day period of not owning the security. However, investors can still buy non-identical securities, such as a different stock or exchange traded fund, in the same industry sector during that period. National Bank of Canada's managing director of ETFs and financial products research Daniel Straus says buying an ETF that holds a stock sold for tax-loss purposes reduces fear of missing out on a bounce-back in the next 30 days. Mr. Straus recently released a report on tax-loss strategies using Canadian ETFs. The report notes that in the information technology sector, Open Text and Lightspeed Commerce have each seen double-digit declines this year. The companies have a 6.2-per-cent and 1.8-per-cent weighting, respectively, in iShares S&P/TSX Capped Information Technology Index ETF.