Template:M summ Equity Derivatives 1.15
Sort of like a mini-index, only static (but modifiable by agreement). In the context of delta-one equity derivatives, there’s little difference between a Basket and a collection of single Share Swap Transactions on the individual Issuers comprising the basket.
You might ask why bother even having them, but if you wanted to trade a fixed block, and keep a single UTI, it might make sense — for trading a modified version of a public index, for example.