Template:M summ Equity Derivatives 1.14
One can draw a serviceable distinction between the “Shares” specified in a Confirmation — which means the abstract concept of a notional participation in the common stock of Teldar Paper etc., represented by a single ISIN — and the precise Number of Shares, being the defined quantity of those Shares relevant in assessing the Equity Notional Amount of a given Transaction.
Where you have a Basket, there will be a weighting of the individual Shares in the Basket which may be articulated in terms of a Number of Shares of that Issuer. This further piques the intellectual challenge.