Article preview: In our latest monthly investment update for October 2019, we take a look at how the global investment markets, economy and commodities are performing. The FTSE 100 index of leading UK company shares closed at the end of September at 7,408.20, recording a decent gain of 2.8% during the month. It was the second consecutive month of gains for the index, continuing its reverse of two months of falls. As we head into the final quarter of the year, European companies are expected to endure their worst quarterly earnings since the start of last year. According to data firm Refinitiv, the firms that make up the Euro Stoxx 600 index are expected to report a 2.2% fall in third-quarter earnings per share.