Underlying Bond Performance: BMDL.US's price heavily depends on the performance of the bonds it holds. Rising bond yields typically decrease its price, while falling yields increase it.

Interest Rate Changes: As an aggregate bond ETF, BMDL.US's price is sensitive to interest rate fluctuations set by the Federal Reserve. Higher rates often depress bond prices.

Credit Risk: Changes in the credit ratings of the bonds within the ETF's portfolio can affect its price. Downgrades decrease the price, upgrades increase it.

Inflation Expectations: If inflation expectations rise, bond yields typically increase to compensate, which decreases the price of BMDL.US.

Market Demand: Increased investor demand for the ETF can drive up its price, while selling pressure can lower it.

Liquidity: The overall liquidity in the bond market can influence BMDL.US's price. Less liquid markets can lead to wider bid-ask spreads and price volatility.

ETF Supply: Creation and redemption of ETF shares can influence its market price. A surplus of shares may lower the price, while a shortage may increase it.