Correction on FTSE250/350/all share20 Jan 2025 09:41
FTSE 100
The FTSE 100 is an index of the 100 largest companies on the LSE by market capitalization. These are usually blue-chip companies.
FTSE 250
The FTSE 250 is an index of the next 250 largest companies on the LSE by market capitalization. These are usually mid-cap companies.
FTSE 350
The FTSE 350 is a combination of the FTSE 100 and FTSE 250. It's a weighted stock market index of the 350 largest companies on the LSE.
The FTSE 350 is a capitalization-weighted index, which means that the weight of each company in the index is based on its market capitalization.
FTSE 250 — the next tier down, so the 101st to the 350th largest companies.
The FTSE All-Share Index, originally known as the FTSE Actuaries All Share Index, is a capitalisation-weighted index, comprising around 600 of more than 2,000 companies traded on the London Stock Exchange (LSE). By weighting companies based on their market capitalisation, the index ensures that companies with larger market capitalisations have a greater influence on the index's performance.[1] Since 29 December 2017 the constituents of this index totaled 641 companies.[2] The FTSE All-Share is the aggregation of the FTSE 100 Index and the FTSE 250 Index, which are together known as the FTSE 350 Index, and the FTSE SmallCap Index. The index is maintained by FTSE Russell, a subsidiary of the London Stock Exchange Group. It aims to represent at least 98% of the full capital value of all UK companies that qualify as eligible for inclusion.[3]