Creditworthiness of Issuers: IGIB.US invests in USD-denominated investment-grade corporate bonds. Changes in the credit ratings of these bond issuers directly impact the ETF's price. Downgrades lead to price decreases, upgrades to increases.

Interest Rate Changes: As a bond ETF, IGIB.US is highly sensitive to interest rate movements. Rising interest rates typically cause bond prices, and thus the ETF's price, to fall. Conversely, falling rates boost prices.

Market Sentiment: General investor risk appetite and sentiment towards corporate debt influence demand for IGIB.US. Positive sentiment increases demand and prices, while negative sentiment decreases them.

Inflation Expectations: Rising inflation expectations often lead to higher interest rates, negatively impacting IGIB.US. Lower inflation expectations can support bond prices.

Economic Growth: Strong economic growth might lead to higher interest rates, impacting IGIB.US negatively. Weaker growth could lead to lower rates and potential price increases.

Supply and Demand: Basic supply and demand for the IGIB.US ETF itself can influence its price, independent of the underlying bond market. High demand can temporarily raise the price, and vice-versa.

Geopolitical Events: Major geopolitical events can create uncertainty and volatility in financial markets, potentially affecting investor sentiment and impacting the price of IGIB.US.

ETF Flows: Significant inflows into the ETF can increase demand and potentially push up the price. Outflows can have the opposite effect, decreasing demand and potentially lowering the price.