The iShares TIPS Bond ETF (TIP) garnered $11.4 billion in flows YTD and offers investors exposure to U.S. government bonds with adjustable principal, depending on inflation measurements. With inflation skyrocketing at the end of the year, it has been a popular choice for many investors looking for protection for their assets and is the most popular of the suite of TIPS ETFs that investors have flocked to in a high inflation environment. TIP carries an expense ratio of 0.19%.