Spread % = (NYSE price in USD × FX rate (CAD per USD) − TSX price in CAD) ÷ TSX price in CAD × 100
▶ Watch: Cross-Listed Arbitrage explained in 24 seconds
What it is
Cross-listed arbitrage is the practice of exploiting a price difference for the same security trading on two exchanges, such as a stock listed on both the TSX and NYSE. When one listing is momentarily cheaper than the other after currency conversion, a trader can in theory buy the cheap side and sell the expensive side. In efficient markets these gaps are tiny and close quickly.
Why it matters
The spread between two listings is a useful health check: a wide or persistent gap can flag stale pricing, a liquidity problem, or a data error rather than a free profit. Real arbitrage is hard for retail investors because trading costs, FX conversion fees, settlement timing, and bid-ask spreads usually erase the gap before you can capture it.
How it's calculated
Convert one listing's price into the other's currency at the current exchange rate, then take the percentage difference between that converted price and the other listing's actual price.
How Quintarthai uses it
Quintarthai computes the dual-listed TSX/NYSE arbitrage spread with each listing in its own currency on the cross-border page, with click-to-source provenance on the figures.
Cross-border note. For Canadian dual listings the spread is driven almost entirely by the CAD/USD rate, so what looks like an arbitrage is often just currency movement between the two quotes.
FAQ
Can I make easy money on cross-listed arbitrage?
Rarely. Commissions, FX conversion costs, bid-ask spreads, and the speed of professional traders usually close the gap before a retail investor can profit.
Why does the spread exist at all?
Short-lived gaps appear from currency moves, differing liquidity on each exchange, and timing lags between the two markets, then arbitrageurs and market makers narrow them quickly.
Check your understanding
Why is cross-listed arbitrage usually not a reliable source of easy profit for retail investors?
Commissions, currency-conversion costs, bid-ask spreads, and the speed of professional arbitrageurs typically close the gap before a retail investor can act.