iShares MSCI USA Momentum Factor ETF (MUST.US) price drivers: Underlying Holdings Performance: MUST tracks an index of US stocks exhibiting momentum. Price fluctuations in these constituent stocks directly impact MUST's Net Asset Value (NAV) and therefore its price.

Investor Sentiment: Overall market optimism or pessimism influences demand for ETFs. Positive sentiment can drive increased buying pressure, pushing the price up, while negative sentiment can trigger selling, lowering the price.

Momentum Factor Performance: The relative performance of momentum stocks compared to the broader market affects MUST's attractiveness. If momentum stocks are outperforming, demand and price could rise.

Expense Ratio & Trading Costs: MUST's expense ratio and brokerage commissions impact investor returns. Higher costs can make it less appealing compared to similar ETFs.

Supply & Demand: Basic economics play a role. High demand coupled with limited supply can drive the price up, while excess supply can lower the price.

Index Replication Accuracy: How closely MUST tracks its underlying index affects its performance. Tracking errors can lead to deviations between MUST's price and the expected value based on the index.

Interest Rates & Inflation: These macroeconomic factors can influence investor appetite for equities and impact the valuation of underlying stocks, thereby affecting MUST's price.