I'd say you owe your dad a stock. You said it wouldn't be a problem.
It is. You were wrong. Do the right thing and tell your dad you will make it right for him even if it means you buying the new stock.
He may say not to worry about it but at least he knows he raised a honorable man.
Good grief man. Where did he give any indication he didn't feel responsible? The fact he made the thread shows his feelings towards the situation.
