A yield enhancement note that comes with a conditional fixed coupon payable to the holder and also provides conditional capital protection subject to the underlying asset price remains below a preset level (i.e., the knock-in trigger). However, this note exposes its holder to unlimited losses that may accumulate if the underlying price crosses the strike price (upon activation of the knock-in trigger).

The autocall feature means that the the note is callable (early redeemed) if the underlying price ends up at or crosses the autocall point over the course of a preset observation period or at a specific observation date.

Other types of yield enhancement notes include fixed coupon notes, reverse convertible notes, and booster capped notes.