The value of announced mergers and acquisitions (M&A) transactions involving sub-Saharan Africa during the first half of this year has reached $18.1-billion – the highest first-half level since 2013. Thomson Reuters’ quarterly investment banking analysis for the sub-Saharan Africa region found that inbound M&A activity during the first six months of the year rose to a four-year high of $10-billion, with investments led by the US, the UK and China.