(1) In options trading the subscription ratio specifies how many warrants or certificates are required in order to acquire the right to purchase (call) or sell (put) a share or other underlying at a fixed price. Example: A subscription ratio of 10:1 means that ten warrants are required to purchase/sell an equity.

(2) In the case of a capital increase the subscription ratio indicates the relation of the number of old equities to the number of new equities. For instance, a ratio of 5:3 means that there are three new equities for every five old equities.