RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:RE:Air Canada Number 1 - For percent of float short I guess you look to the definition of a short sale ie a sale! Statistical Data for a short sale can be gathered and used in a number of ways. IROC reports a 2-week period closing. As I recall the TMX for the most part is live so day to day. Short volume data is based on the number of shares sold short in a given time usually presented as a ratio or a percentage. It does not take into account the number of trades made to close the short position. So I guess the answer is yes as I understand it a short sale could actually account for a much greater percentage of volume than you are seeing reported. That said, remember all these reports have parameters including but not limited to time.