Market sentiment: Overall investor confidence and risk appetite significantly influence demand for the ETF, driving its price up or down.

Underlying asset performance: The value of the securities held within the ETF directly impacts its net asset value (NAV) and market price.

Supply and demand: Higher demand for the ETF than supply pushes the price upward, while greater supply than demand leads to a price decrease.

Interest rates: Changes in interest rates can affect the attractiveness of the ETF relative to other investments, impacting its demand and price.

Currency fluctuations: For international ETFs, exchange rate changes between the ETF's currency and the underlying assets' currency can influence the ETF's value.

Expense ratio: A higher expense ratio may make the ETF less attractive to investors, potentially impacting its price negatively.

Index tracking accuracy: How closely the ETF mirrors the performance of its target index affects its attractiveness and, consequently, its price.

Geopolitical events: Global political and economic events can trigger market volatility and impact investor sentiment, affecting the ETF's price.

Company Specific: PLAN.PA ETF’s price can also be affected by company specific conditions, such as revenue growth.