But don't forget that a lot of these instruments and strategies were also around in the 1920s. The fallout from the 1929 crash and subsequent depression was ma

But don't forget that a lot of these instruments and strategies were also around in the 1920s. The fallout from the 1929 crash and subsequent depression was many changes in regulation. As these were gradually unwound, the products and strategies came to exist again, with the same consequences.