ATs SB on Q86r: Fold to the Cold 4-Bet

Hero
A♣T♣
Position
SB vs BB
Pot
All-In Preflop
Flop
8♣ 6♦ Q♥

While ATs is a mandatory 3-bet from the SB, it cannot profitably call a cold 4-bet jam from the Big Blind at this stack depth.