Where it comes from

The SEC publishes the fails-to-deliver data in two files a month, from reports by the National Securities Clearing Corporation.

Who reports it: The National Securities Clearing Corporation reports the balances to the SEC, which publishes them in two files a month.

Official source

How often we update it
Twice a month, when the SEC posts a file
Last updated
(15 hours ago)
Coverage
About two years of settlement dates. The SEC publishes files back to 2004. Before September 2008 only balances of 10,000 shares or more are listed.
Worth knowing
These are running balances, not new fails: a share that stays undelivered for ten days is counted on each of the ten days, and the file does not say how old a fail is. The SEC says the numbers are not evidence of abusive or "naked" short selling, and are not necessarily the result of short selling. Fails have many causes, such as processing delays, market makers filling orders and hard-to-borrow shares, and most are cleared within days. The biggest balances are often in funds (ETFs), which have their own creation and redemption process, so the list covers listed companies unless you ask for everything. The value uses the previous day's close from the SEC's file, which may differ from other sources. Before September 2008 the SEC listed only balances of 10,000 shares or more.

See the Fails to deliver page · Use this data in your AI or app (how connecting works) · Information, not investment advice (disclaimer).