Market Stability Seen in IBTL ETF Despite Modest Annual Gains IBTL, the iShares iBonds Dec 2031 Term Treasury ETF, has shown a 3.31% price increase over the past year, trading at $20.28 as of April 17. The ETF’s volatility remains low, with a 1-year volatility of just 0.06 and a beta close to zero, suggesting resilience in uncertain markets.34