The picture of stock markets presented here lends support to this picture of the financial sector. We can see the distribution of k-states (relative growth rate states) moves in concert during the financial crisis:
This means that, to first order, the financial sector (gray) can experience a shock behaving like an "anti-Keynesian" government sector (blue) where the rest of the distribution represents the entire economy:
The Keynesian government sector case was discussed here.
This was inspired by an exchange between Dan Davies and Noah Smith on Twitter:
@dsquareddigest @dandolfa @AdamPosen @t0nyyates Could you model finance in a more realistic way? And if so, how?— Noah Smith (@Noahpinion) January 14, 2017
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Also, try to avoid the use of dollar signs as they interfere with my setup of mathjax. I left it set up that way because I think this is funny for an economics blog. You can use € or £ instead.
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