The daily short volume report doesn't really have anything to do with Reg SHO. God only knows why they called it that. Reg SHO was instituted in 2005. FINRA began publishing the short volume list in early 2010.
The actual "Reg SHO list" is the Daily Reg SHO Threshold List. For OTC issuers, it's here:
The Threshold List shows significant and persistent fails to deliver. Those fails may be either long or short; long fails are surprisingly common. It's always seemed painfully obvious to me that if a stock doesn't have persistent (short) fails to deliver, it cannot have an NSS problem.
As you can see, currently nearly all the Threshold List companies are foreign issuers. Their fails may have to do with problems at their primary trading venues. Right now, only three stocks are the equity of domestic issuers.
Only THREE.
The Threshold List is published every night at around 11 p.m.
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