How much is a USD MST?

Excuse me, I'm a bit confused about the current exchange rate for a USD MST. Could you please clarify what the current value of one USD MST is? Is there a specific platform or market where this information is most accurately reflected? I'm particularly interested in understanding the factors that might influence the price of USD MST and how often these fluctuations occur. Additionally, are there any potential risks associated with investing in USD MST that I should be aware of? Thank you for your assistance.