Shrill Links.

1. After that, we must take on the even harder job of sorting through the explosion of financial instruments that have proliferated in the boom and deciding which belong in our kit of tools and which should be relegated to the waste heap. If they genuinely spread risk and help move capital into more productive uses, they should stay. But some exotic derivatives seem mainly to reflect the efforts of traders to outsmart each other. Their opaqueness may entail more systemic risk than social value.