Underlying Index Performance: The primary driver of 18MF.F's price is the performance of its underlying index. If the index rises, 18MF.F will generally rise, and vice versa.

Supply and Demand: Market forces of supply and demand for the ETF itself influence its price. Higher demand tends to push the price up, while higher supply tends to lower it.

Net Asset Value (NAV): The NAV, reflecting the total value of the ETF's holdings minus liabilities, acts as a theoretical fair value. Significant deviations between market price and NAV create arbitrage opportunities.

Expense Ratio: The ETF's expense ratio, representing annual management fees, indirectly affects its price by reducing the overall return to investors.

Trading Volume/Liquidity: Higher trading volume usually means tighter bid-ask spreads, leading to more efficient price discovery and potentially smaller price fluctuations.

Market Sentiment: Overall investor sentiment and risk appetite can impact demand for 18MF.F, influencing its price irrespective of fundamental factors.

Currency Fluctuations: If the underlying assets are denominated in a currency different from the trading currency of 18MF.F, exchange rate movements will affect its price.