Buy puts...or try the SSF's on the Q's...IB allows both in IRA's:
What Can I Invest In? Stocks plus covered call writing (covered shares are restricted), buying calls (funds equal to the aggregate exercise value of the long calls are restricted), and buying puts (shares subject to exercise are restricted). The IB IRA may be structured as a Stock Cash Account (if you choose to trade only stocks) or as a Stock Options Level I Account (if you choose to trade options in your IRA). IRAs may also invest in futures.