I did this some years back by owning stock and carrying a large balance on my credit cards. and got lucky. I wouldn’t do it again.
The risk here is that you buy commodities and charge up the cards. Then the market doesn’t do what you expected and/or you lose your job, are forced to move, credit card company jacks your rate to 24.99%, etc, etc, etc.
You could also open a margin account if you really want to leverage and have the opportunity to get margin calls as well.
Personally, I think you should borrow money from me at 14%, I’d be happy to get that.