Ann: Becoming a substantial holder, page-4

Can somone please explain to me why this stock is continuing to be sold off like no tomorrow, and continuing its decline, considering
a) A big green day for the Dow
b) Recent substantial holdings at a higher price
c ) SP siitting below CR price.

Normally after selloffs and considerable falls in SP the sellers start to thin out. However imm seems to be doing the opposite.

I have been holding this stock for a while and currently at 50 percent loss. Really wanting to average down but i just dont know how low this will go.

Very concerning and im hoping its not specific to this stock, despite being my only red stock today, and most other days.