US equity markets retreated, with the S&P500 pulling back from the previous session's record close as some uncertainty re-emerged on the US-China trade front - Dow down -140-points or -0.52% with 3M Co (down -2.01%) and Walgreens Boots Alliance Inc (-1.93%) alone knocking a combined ~30-points off the index. The broader S&P500 -0.30%, NASDAQ -0.11%. For the month of October, the Dow rose +0.48%, S&P 500 +2.04% and Nasdaq +3.66%.