You can simulate what you want by simultaneously buying an at-the-money protective put and selling an at-the-money covered call. Then regardless of future stock price movement, at expiration (i.e. when the "loan" needs to be repaid) you always transfer the stock away.

Now why don't you plug in this scenario into any Black–Scholes calculator and see how much of a net credit at entry you get (if you even have one). That would be the maximum loan amount you'd be able to get under this scheme. If you could get one at all, the loan amount is tiny compared to the value of the asset.