This is a permanent market, where you can buy shares when you believe one side is undervalued and then sell them when you think your side has over-corrected, similar to a traditional stock market. In this case, you are buying and selling shares for the concept of this type of "stock" market on Manifold.

(So basically, to determine whether the "stock" is over- or undervalued, you might want to ask questions like, "Are Manifold stock markets useful?", "Are they fun?", "How well do they actually imitate real stock markets?", or "Do Manifold users like them?")