Value is correct in this instance, I think.

The number of shares and the price people are willing to pay for those shares is how “value” is calculated, I think.

In contrast, “wealth” would be how much money they have in the bank.

Why not just have both a male and female voice, and ideally one that’s as neutral as possible?

Okay, I’ll bite. What does “a Hobbit” mean as a unit of measurement?