Warren Buffett's Will Directs a 90-10 Split Between S&P 500 and Treasury Bills

A portfolio consisting of 90% in a low-cost S&P 500 index fund and 10% in short-term government bonds is the asset allocation Buffett directs in his will for his wife's trust. Buffett specifies Vanguard as the preferred fund provider for this strategy. The Vanguard S&P 500 ETF (VOO) carries an expense ratio of 0.03%, while the Vanguard 0-3 Month Treasury Bill ETF (VBIL) carries an expense ratio of 0.06%. A portfolio of VOO and VBIL delivers the asset allocation and low-cost structure endorsed by Buffett.