Marjorie A.’s Answer
Any experience in a field of interest is good. Don't belittle the opportunity because it's an internship. That's where most successful people begin their resume. Take advantage of the opportunities; such as, networking with your boss and cohorts, being responsible and attentive to tasks, and being assertive in learning all you can about banking and investing. If this is your second year, it wouldn't hurt to be a good role model to the new interns, and be supportive.
This opportunity might earn you a distinguished letter of recommendation for your first job. Therefore, put your best foot forward.
Hope this helps!