The iShares 20+ year Treasury Bond ETF TLT.O attracted $1.4 billion of inflows in the past three weeks to Thursday, with around $447 million added in the last week. By Lisa Pauline Mattackal July 9 (Reuters) - Recent price rallies in U.S. government debt drove flows into exchange-traded funds tracking longer-dated Treasuries, according to BlackRock ETF provider iShares. US/ BlackRock's Nagrath noted that recent pullbacks in inflation breakeven rates have increased flows into short-duration, inflation-linked TIPS bond funds, with those ETFs adding $7.7 billion in 2021.