Hi and welcome to the forums
Opening revolving accounts doesn't boost scores (past first few accounts) unless new account significantly decreases aggregate utilization.
If your utilization isn't high, there will be no boost (as long as this isn't your second or third card).
If you haven't applied for a new account in the past 12 months and you have a clean file, you will experience scoring loss
If you have new revolving accounts from last 12 months, score may decrease if aging metrics are affected, or it may remain same.
Why do you think opening account might increase score?
