On this day in 1959 Spirax-Sarco Engineering listed on the LSE.

The following chart plots the average monthly out-performance of the shares over the FTSE 100 Index since 1988. For example, on average Spirax-Sarco Engineering has out-performed the FTSE 100 by 5.0 percentage points in March.

Observations:

1. The strongest month for Spirax-Sarco Engineering shares relative to the market has been March (the shares have out-performed the market in this month in 20 of the last 23 years).
2. The weakest month for Spirax-Sarco Engineering relative to the market has been July (the shares have only out-performed the market in this month in 10 of the past 24 years).

Spirax-Sarco Engineering is in the FTSE 350 Industrial Engineering [NMX2750] sector.