Futures pricing and div yield div, equity, position, afternoon, long

IAmNeil

If div growth on an equity index unexpectedly increases and I hold a short position on an index future I thought I benefited, but schweser exam 5 afternoon session says the LONG gains.

Their rationale: Higher div means index value increases and all else equal, the long gains.

My rationale: Higher div yield lowers futures prices so if I'm short the future to sell at a fixed price on a certain date my short position benfits.

A higher div yield makes futures prices lower I thought.

What do you gusy think here?? Which side of the future gains when div yields increase?