I know it's a long time to be exposed to the market, but I found what looks like a very safe trade -- with a huge trading range.
Sell 15 May RUT 650 puts - RUYQJ
Buy 15 May RUT 640 puts - RUYQH
Credit of about $.55 ($825)
Sell 15 May RUT 810 calls - RUZEB
Buy 15 May RUT 820 calls - RUZED
Credit of about $.50 ($750)
Total net credit and profit potential of about $1,575. Maximum profit range is 650 to 810. Maintenance is $15,000.
Be careful when placing your trades. Always double check the symbols.
Good luck and trade smart!