Binance cuts BITOUSDT contract size by 50%

Three separate changes to Binance’s USDⓈ-M derivatives setup are rolling out across November, touching collateral ratios, tick sizes on seven perpetual contracts, and the contract size of BITOUSDT. The official notices are Binance’s collateral-ratio announcement, the tick-size notice, and the BITOUSDT contract adjustment.

Binance will revise the Cross Margin Borrow and Transfer-out collateral ratio, the Portfolio Margin collateral ratio, and the Tiered Collateral Ratio for Portfolio Margin Pro across certain assets.

FIL and HBAR are the named assets. Their Portfolio Margin and Cross Margin collateral ratio climbs from 50% to 60% — a 10-percentage-point move, or 20% relative to the former figure.

The tick-size changes land earlier, at 06:30 UTC on November 11. UAIUSDT, KGENUSDT and PRLUSDT move from a minimum price increment of 0.0001 to 0.00001 — a 90% reduction, since 0.0001 minus 0.00001 equals 0.00009, or nine-tenths of the old tick. RIVERUSDT goes from 0.001 to 0.0001. SNXXUSDT, RAMUSDT and INTWUSDT each step down from 0.01 to 0.001.

Then there’s BITOUSDT, with a hard operational clock. At 00:45 UTC on November 19, Binance will terminate all BITOUSDT strategy bots and close all positions automatically. Fifteen minutes later, at 01:00 UTC, an Adjustment Scale Factor of 0.5 takes effect — a 50% contract-size reduction, since 1 minus 0.5 equals 0.5. The underlying driver is a 1-for-2 reverse share split by the asset’s issuer.

Trading on the revised contract resumes at 03:30 UTC. The Last Price Protected mechanism applies through 14:30 UTC, at which point standard Mark Price calculation returns.

The 00:45 UTC cutoff on November 19 is the action point for anyone carrying BITOUSDT exposure.