The following are spot rate quotes in the interbank market:
USD/EUR 1.4559/1.4561
JPY/USD 81.87/81.89
CAD/USD .9544/0.9546
SEK/USD 6.8739/6.8741
In a previous question we calculated that JPY/CAD cross rate was 85.76/85.80
If a dealer quoted a bid–offer rate of 85.73/85.75 in JPY/CAD, then a triangular arbitrage would involve buying:
answer: CAD from the dealer and selling it in the interbank market, for a profit of JPY 0.01 per CAD.
Initially, I assumed that triangular arbitrage meant we had to go through 3 currencies to come back to where we started, but in this case, we are only working with two. Or did we need to use the given rates to calculate the answer.
The answer assumes that you understand that selling it in the market involves two other currencies. It would be much better if they were clearer in their explanation.