While ETFs are excellent mutual fund equivalents to use in IRAs, the ability to participate in corrective moves (ie, "short") is limited due to the "No shorting in IRAs" regulation. This is true for any IRA, not just Interactive Brokers (IB). At present, IB allows trading only stocks, including ETFs, in IRAs. Thus one is limited only to long positions. In the present market environment, the occasional use of shorting (or in IRAs, access to inverse index funds such as Juno for bonds or Tempest/Ursa for SPX) is vital to generating better year-end returns. Were IB to have a partnership with Rydex, for instance, access to their Benchmark and Dynamic reverse index funds would provide just that capability. With this one idea, IB would vastly improve its ability to gain clients from brokerages already offering that access, eg, Fidelity, particularly as IB already out-scores them in fees, commissions, and innovations such as the Friends/Family Advisor. If IB isn't already considering this, I do hope this suggestion is enough to put it into your plans for the near future. PS- I also post this suggestion at the IB site. I post it here to see if there are others considering an IB IRA account but are hesitant because of the lack of an inverse fund.