Central bank trick or treat and other world market themes for the week ahead

News Snapshot:

Central bankers will keep investors on alert in the coming days, with the Bank of Japan, the U.S. Federal Reserve and the Bank of England all due to meet, while Apple tops the bill for earnings on both sides of the Atlantic. Here’s your week ahead in markets: SPOOKY YIELDS Open this photo in gallery: Japanese national flag is hoisted atop the headquarters of Bank of Japan in Tokyo on Sept. 20.ISSEI KATO/Reuters It’s no secret that the Bank of Japan has a penchant for surprises, making Halloween Tuesday a fitting day for its policy announcement. October’s global bond market...