Explanation:

A hedge fund that uses a top-down analysis of expected movements in economic variables is most likely using a macro strategy. Here's why:

1. Macro Strategy: This approach focuses on analyzing macroeconomic variables such as interest rates, inflation, GDP growth, currency exchange rates, and other broad economic factors. Fund managers take positions based on their views of how these macroeconomic variables will move and affect various asset classes (stocks, bonds, currencies, commodities).

2. Top-down analysis: This refers to starting with the big picture (global economy, country-level analysis) and then working down to specific sectors, industries, and finally individual securities. This is exactly what macro strategies do - they analyze economic variables first, then determine which asset classes or markets will benefit or suffer.

3. Contrast with other strategies:

   • Relative value strategy: Focuses on identifying mispricings between related securities (e.g., pairs trading, convertible arbitrage). This is more bottom-up and security-specific rather than top-down economic analysis.
   • Event-driven strategy: Focuses on specific corporate events like mergers, acquisitions, bankruptcies, or restructurings. This is also more bottom-up and company-specific.

Therefore, the correct answer is A. macro strategy.