This document contains notes from a lecture given by Brian Butler on international finance and global economics. It discusses several key topics: - The risks to China of holding large US dollar reserves, including depreciation of the dollar and higher US inflation eroding the value of those reserves over time. - The risks to the US from high debt levels and budget/trade deficits, but also why a US default is unlikely due to its ability to service debt in its own currency. - The challenges faced by both China and the US - China wants to diversify reserves for better returns but also avoid currency appreciation, while the US relies on foreign demand for treasuries to fund its deficits.