Underlying Index Performance: The price of AIGPP.PA is primarily driven by the performance of its underlying index. If the index constituents rise in value, the ETF's price will generally increase, and vice versa.

Supply and Demand: Market forces of supply and demand for the ETF itself play a role. Higher demand than supply typically pushes the price upward, while greater supply than demand can lower the price.

Expense Ratio: The ETF's expense ratio, charged to cover operating costs, indirectly impacts returns. A higher expense ratio reduces the overall return relative to the underlying index performance.

Tracking Error: Tracking error, the difference between the ETF's performance and its underlying index, can affect price. Lower tracking error is desirable as it indicates more accurate replication.

Currency Fluctuations: For international ETFs like AIGPP.PA, currency exchange rates between the Euro and the currencies of the underlying assets can influence the ETF's price.

Market Sentiment: Overall investor sentiment toward the asset class or region represented by the ETF can affect its price, regardless of the underlying index's fundamentals.

Interest Rates: Changes in interest rates, especially in the Eurozone, can impact the attractiveness of fixed-income investments within the index, indirectly affecting the ETF's price.