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This might mean that we need two additional subclasses of retractable - soft and hard retractable, even if CFI doesn't cover that. See for example https://www.finpipe.com/types-of-preferred-shares/.
A “straight” or “perpetual” preferred share has no fixed maturity date. It pays its stated dividend forever or “in perpetuity.”
Auction rate preferred shares - need to add a class for this as well. Auction market preferred stock refers to preferred equity securities that have interest rates or dividends that are periodically reset through Dutch auctions. Auction market preferred stock typically reset their dividends every 7, 14, 28, or 35 days and are generally structured as preferred shares (issued by closed-end funds). Auction market preferred stock is also known as auction rate preferred stock. So if we call this auction market preferred share, we should have a synonym for auction rate preferred share.