Seems to me as if somebody (generally) sells just enough at the...

Seems to me as if somebody (generally) sells just enough at the end of each day to bring the price back to where it was.

We would normally expect a volume seller to wait for the price to rise before selling (unless distressed)

The only advantage, (that I can think of), for continually preventing the
SP rising would be to some entity who is thinking of a takeover bid.

Perhaps others have alternate explanations?

Cheers,
Blackpete