Flac has all the sounds a computer can detect. "Lossy" formats (like AAC typically used in mp4 containers) strive to only retain the sounds a person can detect.
https://en.wikipedia.org/wiki/Advanced_Audio_Coding
Unless you're a particularly astute listener AND are listening on high end gear you are unlikely to care about the difference in sound quality.
Is the stock price target in straight USD? What if he conspires to devalue the dollar to achieve the stock price? I guess the production requirements block that?