"I'm not sure how a Roth IRA with a $0 value could receive any capital gains"
Those are two separate scenario, two separate questions.
1) In July 2020, made $5000 to Roth IRA & $1000 to traditional IRA, at that point, I was qualified for making the contribution. In December 2020, sold some stock (Individual Brokerage account) and cause me actually not qualified for any contribution. And Roth IRA & Traditional IRA also have capital gain by the end of 2020, and how to resolve the excess contribution?
2) In July 2020, made $5000 to Roth IRA & $1000 to traditional IRA, at that point, I was qualified for making the contribution. In December 2020, sold some stock (Individual Brokerage account) and cause me actually not qualified for any contribution. And Roth IRA & Traditional IRA are almost wiped out by the end of 2020 (assuming no more than $10 balance), how to resolve the excess contribution? Moreover, from 2020 on, I am probably not qualified for making Roth IRA contribution anymore.
