Original data available here
. The number of insider trading cases increased from 6 a year under President George W. Bush to 15 a year under President Obama. The big increase in cases under Obama didn't come until 2011, which isn't surprising as it takes some time after a case is brought before a sentence is determined. This bodes ill for the increase over cases during the rest of the Obama administration. Some economists have questioned whether there should even be insider trading laws
. The arbitrariness
of what is considered insider trading makes it so that government can often invent crimes after the fact.