In November 2008, the Federal Reserve announced the first of a series of unconventional monetary policies, which would include asset purchases and forward guidance, to reduce long-term interest rates. We investigate the behavior of shorts, considered sophisticated investors, before and after a...

"Most intervention studies have been silent on the assumed structure of the economic system--implicitly imposing implausible assumptions--despite the fact that inference depends crucially on such issues. This paper proposes to identify the cross-effects of intervention with the level and...