2xer, I agree the NDX and MID have been lagging and hasn't corrected as much as the $RUT, $INDU and SPX. So there may be rotation back into INDU and/or SPX the beaten up indexes. While MID & NDX has more to correct/fall.
Today,
$SPX hit the 20% decline from high of 1576 and rebounded off the low @ 1260.
$INDU rebounded off a 21% decline off the 14198 high.
$RUT down ~20%, $MID down only 8.6% and $NDX down 11.6%.
I still think there will be a broad sector bounce before the 4th but the boys may decide to tank everything afterwards starting sometime early next week.