Underlying Asset Performance: The primary driver of 00763U.TW's price is the performance of the assets it holds, typically US Treasury bonds. Rising Treasury bond prices usually increase the ETF's price, while falling bond prices decrease it.

Interest Rate Changes: Interest rate hikes often lead to lower Treasury bond prices, negatively impacting the ETF. Conversely, rate cuts tend to boost bond prices and the ETF's value.

Inflation Expectations: Higher inflation expectations can erode the real return on bonds, causing their prices to fall and negatively affecting the ETF. Lower inflation expectations can have the opposite effect.

Market Sentiment: Overall investor confidence and risk appetite affect demand for safe-haven assets like Treasury bonds. Increased risk aversion can drive up demand and prices, while decreased aversion may lower them.

Supply and Demand: Basic supply and demand dynamics influence the ETF's price. High demand relative to supply can lead to a premium, while low demand can result in a discount.

Expense Ratio: The ETF's expense ratio, while small, can impact returns over time. Higher expense ratios can slightly reduce the ETF's overall performance compared to its underlying assets.

Currency Exchange Rates: Fluctuations in the exchange rate between the New Taiwan Dollar (TWD) and the US Dollar (USD) can impact the ETF's price for Taiwanese investors. A stronger TWD can lower the ETF's price in TWD terms.