NAV of Underlying Holdings: BUFB tracks the ICE US Fallen Angel High Yield 10% Capped Index. Changes in the market value of these high-yield, or "fallen angel", bonds directly impact BUFB's Net Asset Value (NAV), influencing its price.

Supply and Demand: Basic economic principles apply. High demand for BUFB shares relative to supply increases its price, while increased supply relative to demand decreases it.

Interest Rate Environment: Rising interest rates typically negatively impact bond prices, including those held by BUFB, as newly issued bonds offer higher yields. Conversely, falling rates can boost bond prices.

Credit Spreads: Widening credit spreads, indicating increased perceived risk of default in high-yield bonds, can lower BUFB's price. Narrowing spreads, suggesting reduced risk, may increase it.

Market Sentiment: Overall investor optimism or pessimism regarding the high-yield bond market significantly affects BUFB's price. Positive sentiment drives buying, while negative sentiment prompts selling.