1. **Comprehensive Historical Insight**: Including all available data might offer a broader understanding of gold’s historical patterns. Despite restrictions, some argue that understanding gold’s full journey is beneficial.
2. **Understanding Irregularities and Risks**: An exhaustive dataset provides the backdrop of drastic shifts—like the post-1975 fluctuations—allowing you to anticipate potential extreme market conditions.
**A Possible Alternative: Silver and Other Precious Metals**
Given the limitations and potential distortions of the pre-1975 gold data, some investors consider substituting gold with other precious metals like silver, which didn’t face the same ownership restrictions. Silver has its own historical pricing dynamics, providing a possibly steadier alternative during the gold restriction era.
**Wrapping it Up**
Whether or not to include pre-1975 data in your backtesting isn’t straightforward—it depends largely on your specific goals and investment horizons. Weigh the pros and cons in the context of your strategy. If authenticity and alignment with current market freedoms are paramount, consider focusing on post-1975 data. Or, employ alternative precious metals to round out strategy testing.
Your strategies are as strong as the histories you choose to learn from. Will you dig deeper into gold’s historical narrative or isolate the more recent free-market data? Whichever you choose, ensure it aligns with your investment philosophy and strategic goals.