An English Bill of Exchange dated 1810.
Image courtesy of the British Museum Trustees.
Interest rates on bills of exchange could fluctuate considerably. These rates depended on several factors: the prevailing market rate, the particular usage of the bill, the riskiness of the transaction, or the familiarity and strength of the connections involved in the exchange. Main commercial hubs which connected long-distance trading, often featured more favourable rates. Merchants frequently borrowed money through bills where interest rates were low, and sold where rates were high. In this way, complex systems of arbitrage evolved.