SPDR S&P 500 (SPY)

[imiloa]

re: over the summer easier manipulation/less participation,

that's not at all what i said.
i said i see the selloffs after positive earnings jumps
as a sign that deep pockets are unloading into any available retail buying momo.

and thus, that seems a strong signal that the casino doesn't think they can squeeze any more juice from the lemon tree,
and is shifting short for a coming market correction that, imo, might rival 1929, given the record levels of corp and consumer debt, amid dropping consumer disposable income, trade wars, and systematic dismantling of social support systems, including soon medicare and soc security.

spelling it out,
i think the casino is finally ready to shift from bull to bear mode,
making money on the way down, of course,
and that the already struggling low/middle-class workers,
paying high rent with lower salaries and higher debt since 2008,
could find themselves destitute within a couple years,
esp if the govt repeals healthcare on which legions of baby boomers rely,
thus increasing fiscal burden on families.

imo, summer market volume is effectively irrelevant in context of the larger tidal forces cited above.
your mileage is welcome to vary.