Earlier quoted context omitted.
I don't entirely understand this; could you provide a concrete example, or actual trades, that could be involved in such a position? (I'm just curious how it would actually look like in practice.)
Binance: buy $1m BTC/USDT CME: short $1m BTC futures (which are dollar settled and thus BTC/USD) On Binance you are long BTC, and short USDT. On CME you are short BTC and long USD (implicitly on the fiat legs). So if we add that up, the BTC positions net off and you’re just left with short USDT and long USD which is the desired outcome. In practice, if Tether implodes I would expect everyone to sell Tether (by buying…
Unless I'm missing something in your math...