That depends heavily on the terms of the loan you can secure and how you choose to invest the cash.
When you borrow $1M against $100M in cash or assets its generally considered a very low risk loan, meaning you'll likely get good terms and comparatively low rates.
When interest rates were particularly low years ago, we saw a large number of companies issuing bonds and then using the money to just do stock buybacks.
You need to consider secured line of credit vs unsecured and the interest rate is significantly different as one is backed by collateral and the other is not.
