2017 was unusual for US shares. While Japanese, European and Australian shares had decent corrections throughout the year of around 5 to 7%, the US share market as measured by the S&P 500 saw only very mild pullbacks of less than 3%. This was against the backdrop of a strongly rising trend thanks to very positive economic conditions and President Trump’s business friendly policies. In fact, up to its high a week ago it went a record 310 days without a 3% or greater pullback and every month last year saw a positive total return (ie capital growth plus dividends) which is also unusual. This, combined with a very strong start to this year of 7.5%, very high levels of short-term investor optimism and lots of talk of a “melt up” left the US share market overbought and highly vulnerable to a correction, which we may now be starting to see...