With Halloween upon us, we continue our tradition of writing about what might scare markets. While too much fear during stressful times for markets can lead to poor investment decisions, some skepticism in strong markets can be healthy. With that in mind, here are five risks that have the potential to scare markets. We also want to point out, however, that these worries do not change our generally positive outlook. We continue to expect further stock gains for this bull market in the coming year, although potentially with an increase in market volatility.