Nearly $50 billion floods into inflation-linked U.S. bond funds. Why more could be on the way.

This week, another $1 billion streamed into the sector. “The recent chunky inflows follow what has been an unprecedented run for inflation-linked bond funds since April 15 of last year,” the Goldman team wrote.

More inflows could be in the cards too, as investors worry that inflation could stick around for longer than the Federal Reserve — and markets — have been expecting.

“It is dramatic,” said Chip Hughey, managing director of fixed income at Truist Advisory Services, of the inflation-linked fund inflows. “If you are looking at a portfolio in a fixed-income-specific context, you have limited tools to use to protect against inflation, particularly if it’s higher than the market is positioned for.”

This chart shows the dramatic rise in assets under management for U.S. inflation-linked bond funds since the spring of 2020, or the early phase of the pandemic when mass business shutdowns hit the U.S. economy.

The Goldman team pegged the inflows as a 60% increase in assets under management for the funds since mid-April of last year.

Rising fund flows into the niche sector follow more than a decade of low inflation. As the U.S. economy has staged a rebound since the pandemic’s first wave of devastation, so has interest in finding ways to protect wealth from the erosion of higher prices.

U.S. inflation in June rose sharply again, booking a 4% increase over the past year and reaching a 13-year high.

Hughey said the recent “big pop” into inflation-linked bond funds likely signals a shift in investor thinking that the recent red-hot pace of inflation may not be as transitory as many initially thought.

Instead of two to three months, higher prices look more likely to last six to nine months, particularly with upward pressure on rents and wages, he said, in a phone interview with MarketWatch.

“Our take is that while we certainly expect inflation to cool from the really high readings over the past few months,” Hughey said, the Truist team expects it to settle above the average 1.6%-1.7% annual range seen for much of the past decade.

Fixed-income investments can be particularly vulnerable to inflation since higher costs can chip away at the sector’s modest returns relative to stocks, including as already low yields have slid globally, along with extreme support from the world’s major central banks.

See: What the world’s rising pile of negative-yielding debt means for U.S. Treasurys

The 10-year Treasury yield TMUBMUSD10Y, 1.302% rose by 9 basis points on Friday to 1.3%, after a strong Friday employment report from the Labor Department showed the U.S. created 943,000 jobs last month, the biggest gain in nearly a year.

The S&P 500 index SPX, +0.17% was on pace for a 18.1% gain so far this year, through Friday, while the Dow Jones Industrial Average DJIA, +0.41% was up 15% for the same stretch, according to FactSet.

One way for investors to offset the risks of higher costs of living, can be to own inflation-linked securities, including those through offered through mutual funds and exchange-traded funds, like the iShares TIPS Bond ETF TIP, -0.22% or other benchmark tracking VTIP, -0.04% SCHP, -0.21% funds.

Earlier this week, the U.S. Treasury said it would gradually increase the size of its inflation-protected securities, or TIPS, auctions by $1 billion, starting in August, September and October, resulting in expected gross issuance in 2021 of $20 billion.