Sentiment among investors is more bullish than at any point since 2018, according to the American Association of Individual Investors’ survey, a widely used indicator of market sentiment. With policy measures unlikely to be unwound anytime soon and the prospects of a vaccine ever closer, the market prospects appear sound, but investors need to look out for complacency. Risks around the effective delivery of a vaccination programme and the increasing trend in the number of cases in many countries should not be…