If the two were being arb'd ES would have gone down.March YM futures were down 0.7% or more during today's trading while the
other stock index futures were down much less. Then at 4PM YMs pikes
120 points from 24980 to 25100 in a minute or less. I assume that there
is at least some arbitrage between YM and ES. Does anyone know what
is going on?
Like others were saying short covering into the weekend close - while prior resistance zone (25020 to 25050) also was breached.