The SET is considering reclassifying Total Return Swap trades from foreign (F) to broker proprietary (P) accounts, which would lower reported foreign trading value and shift broker market shares. The SET says actual trades and foreign net buying are largely unchanged, and TRS is allowed under existing rules. Data back to early 2025 may be restated. Discussion with brokers is set for 28 October 2026. For a typical SME owner this is background only: no action is needed unless you work with listed-stock investing or follow SET fund-flow data.