YTD, the FTSE100 is up 9.6%, overshadowed by the FTSE250, which is up 20.2%. The median PER for the FTSE100 is 15.3, whilst for the FTSE250 it is 16.2. So the FTSE250 is only slightly more expensive than the FTSE100.
The median PER for Fledgling, “None”, and Smaller cap stocks is 14.3. This figure excludes AIM. So each cap segment is similar in valuation to each other.
The median PER for AIM is 9.3. This will be very approximate, because there are many very small companies that my database doesn’t capture. The PER for AIM is significantly cheaper than the main market.