Stealing @Jesse_Livermore's poll: The US Treasury issues an noncallable, nonputtable perpetual bond paying out the nominal SPX dividend in dollars as its coupon. Where does this security trade relative to SPX itself?
Depends on whether the prospectus says it pays (nominal SPX dividend) or (nominal SPX dividend yield x face value). If the former it will trade in the same range as SPX. If the latter much higher.