Explanation

This strategy is most similar to a Global Macro strategy because:

• Global Macro strategies involve taking positions based on macroeconomic views and forecasts about global economies, currencies, interest rates, and other macroeconomic factors
• Smith is making a bet based on his view about currency movements (Swiss Franc appreciating relative to euro)
• He's taking offsetting positions in government bonds of different countries based on this macroeconomic view
• The strategy involves both currency risk and interest rate risk components

Why not the other options:

• Pair trading (A): Typically involves two similar securities where one is undervalued and the other overvalued, usually within the same market/sector
• Managed futures (B): Focuses on systematic trading in futures contracts across various asset classes using technical analysis
• Event-driven (D): Focuses on specific corporate events like mergers, acquisitions, bankruptcies, or restructurings

Smith's strategy is fundamentally driven by macroeconomic views about currency movements and relative interest rates, which aligns with the Global Macro approach.