Originally Posted by
scubadu
My review of the post you quoted, leads me to believe (I think?

):
- Chase does "backdate" AU cards to original opening date (and thus would not count an AU's card as a 5/24 hit if added to an "aged" primary account)
- Amex does NOT "backdate" AU cards to original opening date (and thus would count an AU's card as a 5/24 hit if added to an "aged" primary account)
- Capital One... honestly, no idea...
- Citi... honestly, no idea...
To use your quote, this is clear as mud to me.
So let's try a couple of clarifying questions:
- If Amex does not "backdate" then if you apply for a new CHASE card, when calculating 5/24, CHASE will include all of your AMEX AU cards that were first issued to the AU in the last 24 months?
- Chase will not include any Chase AU accounts when calculating your 5/24, correct?
Amex does not use 5/24 so presumably it does not matter if you have recent AU cards on your credit report when applying for Amex.