Strong sectors
The following table lists the sectors that have historically been strong in September.
| Sector | TIDM |
| Pharmaceuticals & Biotechnology | NMX4570 |
| Food & Drug Retailers | NMX5330 |
| Electricity | NMX7530 |
| Mobile Telecommunications | NMX6570 |
Weak sectors
And the following table lists the sectors that have been weak in this month.
| Sector | TIDM |
| Industrial Engineering | NMX2750 |
| Aerospace & Defense | NMX2710 |
| General Retailers | NMX5370 |
| Chemicals | NMX1350 |
| Electronic & Electrical Equipment | NMX2730 |
| Media | NMX5550 |
| Real Estate Investment Trusts | NMX8670 |
| Technology Hardware & Equipment | NMX9570 |
| Industrial Metals | NMX1750 |
| Automobiles & Parts | NMX3350 |
