A coin paired with a tokenized stock knows whether that stock's market is open. When it is closed, trades pay a surcharge on top of the tax, chosen by the creator between zero and five hundred basis points. The surcharge goes entirely to the holders lane of the next pour.
effectiveTax = rate + (marketOpen ? 0 : surchargeBps)
Trading a stock paired coin at three in the morning costs a little more and pays the people who are holding through the night. Coins paired with pons or USDG have no kitchen hours; their market is always open.