Tether is trading at exactly $1/$1 on Kraken. It had touched $0.85/$1 on October 2018 though. It was discounted for the last quarter of the last year. The discount lasted for several months suggesting lack of liquidity and possibly lack of funds.
The Tether discount suddenly disappeared. And suddenly a discount/premium appeared on Bitfinex. However, that discount was getting smaller everyday and almost disappeared (until a bit earlier but still negligible in the volatile crypto market).
I personally hold a significant amount of USDT/Finex Dollars and not worried. I think the price is more relevant than the news. The probabilities or lack of funds will be builtin in the price. And the current price suggests that iFinex has got its shit together.