All the companies on the stock market are represented by three characters.
Assuming 26 letters and 10 numbers, this results in 46656 possible combinations (unless my math is wrong), which is a lot of companies but not an impossible number.
What happens when all the possible combinations are taken?
What happens if all the combinations that relate to the companies name is taken? Like if a company was called
ABC was already taken, what could they possible change their code too since there are no other letters in their name? Would they use an unrelated character? eg. Company