The stock market’s postelection surge has pushed 2024’s rally into overdrive, and there seems little standing in the way of a merry end to the year. With the uncertainty of the U.S. election out of the way and a strong economy, history suggests that December will be similarly positive for investors, if not to the same degree. The large number of corporate insiders who are selling stands out on a historical basis, as it’s the second-highest ratio on record dating back to 2004.