Even the dearest Turkish exchange sold Bitcoin below the world price on Oct 17. BtcTurk read -8.1 bps and Binance TR was the cheapest at -18.4 bps, across the 5 exchanges in the index.

The Turkey Premium Index stood at -0.11% (-11.2 bps), the 7th day in a row on the discount side. The dollar did the work. Tether traded at -11.8 bps against the official USD/TRY rate, and the coin itself added +0.6 bps.

The 24 hour average was -22.6 bps and the 7 day average -9.1 bps. This is a quoted price gap, not a trade anyone can lock in.