What happens to a Robinhood stock token in a split?
A split multiplies uiMultiplier() by the split ratio and leaves raw balances alone. Because a split is a price discontinuity, the contract requires a scheduled pause window and manual confirmation before trading resumes.
In a 4-for-1 forward split the multiplier moves from roughly 1.0 to roughly 4.0. A holder's balanceOf() is identical before and after; balanceOfUI() quadruples.
The pause is announced ahead of time. /corporate-actions lists the action with status IN_PROGRESS and a processDate, /assets exposes pendingMultiplier and pendingMultiplierEffectiveTime, and the contract exposes newUIMultiplier() and effectiveAt(). Anyone holding, lending against, or market-making the instrument can see it coming.
Reverse splits work identically in the other direction, and are reported as REVERSE_SPLIT with oldRate and newRate.