Honestly, folks cashing in gains don't drop the SP $7 in 75 sec before the bottom of the hour like happened at 10:30 today.
That's shorting.
Word.
For those who doubt the evidence of the present stock action being shorting activity consider past performance (which is no predictor of the future, yet we all do it).
Earlier this year (Jan 31) the shorts hit their limit: $15B in value at risk. Two weeks later it had only declined slightly amid furious short covering. (Actual amounts were $14.8B and $14.7B.) They then successfully rode the COVID-19 dip (covering/buying on the way down, shorting/selling on the way up). But then it happened again, that $15B limit, peaking Apr 15 at $14.7B. The shorts (in aggregate) covered, but once the value at risk dropped enough ($13B, May 15) they started building up the value at risk again. Which peaked Jun 15 at $15B.
While the amount of losses has (so far) not found a limit, the value at risk does not exceed $15B. Instead, it bounces off (they cover) and then start shorting again. We do not yet have the end of June short data, but given the current evident shorting activity they must have covered.
An alternate explanation, that $15B is not in fact a cap for the value at risk, is certainly possible but given the information at hand is less probable. But trying to say it isn't shorting? If it looks like a duck and quacks like a duck -- yeah, sure, it might not be a duck, but that *does* seem to be the probable explanation.
The point here is that -- despite the high stock price -- new shorting is enabled by covering since June.
Finally, I'm sure someone will bring up @ihors3 fantasies. He has projected short interest at substantially more than $15B. And he was wrong. At the beginning of the activity I mentioned above, @ihors3 claimed it was more, $16B and then, when it was actually falling due to significant short covering, he claimed it rose even higher, to $17.5B. He again claimed $16B for Jun 15 which, predictably, was again exaggerated by ~$1B.
To be clear, I am using value at risk for the above and because @ihors3 is... inventive... about how he reports short interest if you look up his tweets you will find the numbers vary a bit. That's because he chooses an undisclosed stock price to calculate the value at risk. For the foregoing I have used the closing price and his claimed shares shorted. I do that because he reports value at risk, shares shorted and percent short interest. The latter is just another way of expressing shares shorted and the official figures are expressed as shares shorted so shares shorted is how I track short interest. The reason I used value at risk here is because shorting behavior appears to vary by the value at risk -- in particular the $15B limit.