The FTSE 350 Index, curated by FTSE Russell, is a significant stock market index in the UK. It merges the FTSE 100 and FTSE 250 indices, encompassing the largest 350 companies on the London Stock Exchange. This index provides a comprehensive view of the UK stock market's performance, reflecting the economic health of leading businesses. https://kalkinemedia.com/uk/ftse-350-nmx