What is the fine-grained topic of the following text: Looking at options trading activity among components of the Russell 3000 index, there is noteworthy activity today in Express, Inc. , where a total volume of 15,740 contracts has been traded thus far today, a contract volume which is representative of approximately 1.6 million underlying shares (given that every 1 contract represents 100 underlying shares). Only return the topic.
Options trading activity in Express, Inc.