Factor and data series importing

Chris, yes, that is correct.

That’s phenomenal. With 22,487 stocks that have been delisted since 1999, that’s 1,071 stocks removed per year.

With about 8,400 stocks tracked at any given time by Portfolio123 in the ‘All Fundamentals’ Universe, that’s nearly 8% of all companies delisting every year, from mergers, acquisitions, bankruptcies, and more esoteric reasons. Of course, there would also need to be about the same number of new companies listing because the database has stayed pretty

I’m wondering, does the ‘delisted list’ include penny stocks that wouldn’t make it into the P123 database for ‘All Fundamentals’ or ‘All Stocks?’ In other words, are some (or many) of the stocks listed on that page stocks that were never included in the P123 Equity database?

Well, Chris, it’s complicated. When a company changes something fundamental about itself, it gets a new ticker symbol. So, for example, SMMT was an ADR and isn’t an ADR any more so there is now an SMMT and an SMMT.2^20. Summit Therapeutics was never actually delisted. So that count is off. The same thing can happen when a stock goes from OTC to NASDAQ or vice-versa.

But every stock there was at some point an active stock in the “All Stocks” universe.

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