How Short Selling Percentage Is Calculated
Shortvolume.com receives their data from FINRA, a private entity that is tasked with monitoring certain aspects of the stock markets. On their website the following explanation of short percentage is given:
"Pursuant to a Securities and Exchange Commission request, FINRA has agreed to make reported short sale trade data publicly available."
Notice that they say short sale data and not short transactions. Looks like the "sell to open" transactions are what they monitor. I looked at data from Friday and here it is:
Date|Symbol|ShortVolume|ShortExemptVolume|TotalVolume|Market
20180406|TSLA|2854214|4762|5389970|Q
You can see that when you divide the short volume of 2.85M by the total volume of 5.39M you get 52%, which was indeed the short percentage of trading for Friday. Why they are looking at volume of only 5.39M when TSLA had a volume of 13.2M shares is unclear. Anyone know the answer? In any event, if we're only looking at the selling side of the short equation, covering by shorts would not register on the percentage of short-selling numbers. That's the way way I see it, at least.
Shortvolume.com receives their data from FINRA, a private entity that is tasked with monitoring certain aspects of the stock markets. On their website the following explanation of short percentage is given:
"Pursuant to a Securities and Exchange Commission request, FINRA has agreed to make reported short sale trade data publicly available."
Notice that they say short sale data and not short transactions. Looks like the "sell to open" transactions are what they monitor. I looked at data from Friday and here it is:
Date|Symbol|ShortVolume|ShortExemptVolume|TotalVolume|Market
20180406|TSLA|2854214|4762|5389970|Q
You can see that when you divide the short volume of 2.85M by the total volume of 5.39M you get 52%, which was indeed the short percentage of trading for Friday. Why they are looking at volume of only 5.39M when TSLA had a volume of 13.2M shares is unclear. Anyone know the answer? In any event, if we're only looking at the selling side of the short equation, covering by shorts would not register on the percentage of short-selling numbers. That's the way way I see it, at least.