<prompt> Human: I recently received a mailer from Trumark Financial Credit Union for a 7 month CD at 7. Maximum deposit is 2,500 and you have to be a new member but is this too good to be true? The fine print doesnt mention anything nefarious that I can see but I still wanted a second opinion. Am I stupid not to take advantage of this?  <response>: Its basically a signup bonus.7 annual interest on 2500, for 7 months, is about 102 of interest. Thats less than the signup bonus for many credit cards. Plus the interest will be taxable.When the 7 CD matures, the credit union will automatically roll it over into a much lower yielding CD. The credit union is betting that you wont bother to opt out of the automatic rollover. 