The $22.4 billion iShares TIPS Bond ( TIP ) is the largest in its category and gained 0.89% this year as investors looked for ways to protect their moneys against potential rise in inflation. One way to do that would be to create an 80%-20% allocation to TIP and a fund that shorts Treasuries, such as Sit Rising Rate ETF ( RISE ), thereby stripping out duration risk. "What we saw in January has continued this month: That's really been a heightened allocation into the corporate space," said Matthew Bartolini, senior research strategist for SPDR ETFs and SSGA Funds.