I was a derivatives trader, and it occurred to me the world would hardly change at all if credit derivatives ceased to exist. Not so nurse practitioners. Is this statement (from the article) true? I'm under the impression that financial innovations throughout history have generally spurred capital investment. Innovations like fractional-reserve lending have made bankers&investors wealthy, but also spurred spending on…
It's sorta up for debate. My understanding, which is tiny and very limited, is that you can think of the role of finance operators as "liquidity providers". They're the grease in the wheels of capitalism; by either providing access to capital (via loans, or investment) or by matching buyers with sellers. A classical example is you're a farmer that wants to hedge the risk that your crop will fail due to random weather…
It would not take to great a stretch of the imagination to imagine regulation covering the maximum frequency at which trades could occur.
We would have to decide what sort of delay we consider tolerable, then (perhaps) hold auctions at that frequency - perhaps once per millisecond, perhaps once per minute, maybe even once every 10 minutes?