RE:Risky as rates rise. Strong volume signals future panic
mariorizzi wrote "...Somebody is liquidating...."
That is correct.
Now, one should pay close attention to the actual trading. Where is the selling coming from? Typically RBC has been the seller for the last few weeks (presumably on behalf of a institutional client).
Until yesterday their lowest selling price was $143.00 (heavy volume); today they lowered it to $142.00 which would indicate that they are most likely nearing the end of their liquidation.
Time will tell.