What is immoral is not necessarily illegal
If you look to investment banking/securities/management firms for moral guidance, you’re doing something wrong.
Are you making an accusation of immorality?
Some of the food price increase is due to crop failure, etc.
But, much more of it is due to citizen failure. Continuous election and allowing of the conditions that lead to a lack of prosperity.
Is it immoral to wager on humanity's constant ability to work against their own self interest?