$GS $JPM $C TD Ameritrade chief market strategist JJ Kinahan said this week that investors need to keep big bank earnings declines in perspective. “They’re comparing fourth-quarter results to their results from fourth-quarter2018, back when they were still banking profit from the tax legislation that took effect at the start of 2018. Now they face tough comparisons vs. that period, but earnings throughout 2018 reflected in part a one-time boost.”