FTSE
From ACT Wiki
FTSE 100
1. A share index made up of the 100 largest companies on the UK stock market.
2. The 100 companies themselves.
FTSE 250
1. A share index made up of the next 250 largest companies on the UK stock market, after the top 100.
2. These 250 companies themselves.
FTSE 350
1. A share index made up of the largest 350 companies on the UK stock market.
2. The 350 companies themselves.