We’ve all heard of TIP, right? If you’re a long term commodities investor that buys on the dips, you might use this highly liquid ETF as the short term place for your dry powder. In theory, it protects from inflation, since the ETF holds only Treasury Inflation-Protected Securities (TIPS). In practice, the return on these TIPS is based on the movement of the CPI over time. Is this a problem? Depends whom you ask.