Shares that like March
The following table lists the five FTSE 350 shares that have the best returns in March over the last ten years. For example, Aggreko has an average return of 11.7% for the month of March. Each stock has risen in March in at least nine of the past ten years; Intertek is the only FTSE 350 company whose shares have risen in every March for the past ten years.
| Company | TIDM | Avg(%) |
| Aggreko | AGK | 11.7 |
| Restaurant Group (The) | RTN | 11.4 |
| Intertek Group | ITRK | 9.2 |
| IMI | IMI | 7.9 |
| Cobham | COB | 6.1 |
Shares that dislike March
The following table lists the five FTSE 350 shares that have the worst returns in March over the last ten years. For example, Aviva has an average return of -7.7% for the month of March. All five stocks have fallen in March in at least eight of the past yen years.
| Company | TIDM | Avg(%) |
| Aviva | AV. | -7.7 |
| RSA Insurance Group | RSA | -4.3 |
| Renishaw | RSW | -3.7 |
| Royal Bank of Scotland Group (The) | RBS | -3.2 |
| HSBC Holdings | HSBA | -3.1 |
An equally-weighted portfolio of the above strong March stocks would have out-performed every year an equally-weighted portfolio of the above weak March stocks by an average of 13.7 percentage points in March for the past ten years.
