How about [Financial markets]?? -- "Financial markets" ordinarily refers to markets in specifically financial instruments, like treasury bonds. Commodity exchanges only deal in commodities--steel, corn, or whatever. Two problems: I don't know of a term for all kinds of trading, except "trading"; and the exchange is actually different from the market--the exchange is a specific organization to facilitate trading, the market is the overall effect of all the trades. Bottom line--I don't know what title would work.
Maybe call it "____ Trading" or "____ Markets" and add a paragraph at the top on markets or trading in general? Anyone searching on the phrase "stock exchange" would get here anyway.--AMT