OKX, one of the largest cryptocurrency exchanges, has suspended all trading in UST, LUNA, and two other blockchain tokens, Anchor and Mirror. LUNA perpetual swaps are being delisted by FTX. Binance, the world's largest exchange by trading volume, said it suspended spot trading for LUNA, the native token of Terra blockchain, and TerraUSD, or UST, the dollar stablecoin that lost its peg, against Binance's stablecoin Binance USD before resuming earlier Friday. Huobi took similar measures. It should be noted that Binance and OKX are both investors in the Terra project.