So sorry to hear about the refusal. Hopefully they will reopen your case, don't give up!I just sent them a 5 page essay about it, l'll let you know what they say. I could understand the reasoning about stocks being unstable, but they should be very clear about any restrictions about stocks. They even listed investment accounts in their proof of funds page for express entry PR, I mentioned this in my letter. There was someone who posted on here who got his case reopened after his employment letter was rejected for missing something. I hope I'm similarly lucky.
I think it might be cheaper for me to just resubmit versus hire a professional. But I'm trying to have faith in Canada to do the decent thing, so hopefully I should not have to resubmit.
Cheering for you and hoping for the best with all my heart.