Can't short a IRA. As far as brokerage account most brokers charge a boat load to short a pink if you can find one that will. Then like I said before there is the FINRA requirements 2.50 per share. retail shorting in the pinks a myth.
Prime reason you can't short in pinks it today... any shorts would be taking out a loan to cover if we keep this sp.
MM's can short but they will cover on the other side. In the end its all based on making a market buys and sells.
I believe that if you own stock in an IRA that it can't be borrowed to short for the same reasons.
So this strategy of putting a limit order on to lock people out of shorting/squeezing those who already have would only apply to brokerage accounts rather than IRAs.
News 
Market Data 
Discover 
AI
