Stress testing a multi asset portfolio

Can anyone recommend a tool to crash test a portfolio using black swans type what-if scenarios?

 

Doesn't your trading platform have a "what if" simulator that can be beta adjusted?

 

Only for stocks to my understanding

 

You need multi asset,I.e stocks bond,commodity?

 

Mostly stocks and options.

 

Ild be surprised if your trading platform didn't have that type of analysis..What platform are you using?

 

IBKR Risk Navigator

 

That should do it