Treasury Bond ETF Gains Record Inflows The iShares 20+ Year Treasury Bond ETF (TLT) recorded a surge of $802.5 million in investments, boosting its assets to $51.7 billion. This was part of over $1 billion channeled into U.S. fixed-income funds, contrasting with outflows in international equity and commodity funds, which faced declines of $191.6 million and $137 million, respectively.1