| ECV | EEF | ENS | RBB | ROH | RSR | RWD | |
| Sector Weights At The Start Of Each Quarter* | Energy Conversion | Energy Efficiency | Energy Storage | Renewables – Biofuels & Biomass | Renewables – Other | Renewable – Solar | Renewable – Wind |
| Latter Q3 2023 | 17.30% | 20.20% | 14.42% | 2.88% | 5.78% | 25.00% | 14.00% |
| Latter Q2 2023 | 15.00% | 20.00% | 15.00% | 3.00% | 6.00% | 27.00% | 14.00% |
| Latter Q1 2023 | 13.00% | 21.00% | 16.00% | 3.00% | 6.00% | 27.00% | 14.00% |
| for Latter Q4 2022 | 12.00% | 19.00% | 21.00% | 4.00% | 6.00% | 22.00% | 15.00% |
| Q4 2022 | 12.00% | 18.00% | 22.00% | 3.00% | 6.00% | 23.00% | 15.00% |
| Q3 2022 | 12.00% | 19.00% | 21.00% | 3.00% | 4.00% | 23.00% | 18.00% |
| Q2 2022 | 12.00% | 21.00% | 21.00% | 3.00% | 4.00% | 23.00% | 16.00% |
| Q1 2022 | 13.00% | 20.00% | 18.00% | 5.00% | 4.00% | 25.00% | 20.00% |
| Q4 2021 | 13.00% | 15.00% | 19.00% | 7.00% | 4.00% | 26.00% | 16.00% |
| Q3 2021 | 15.00% | 13.00% | 18.00% | 7.00% | 4.00% | 26.00% | 17.00% |
| Q2 2021 | 16.00% | 13.00% | 16.00% | 9.00% | 4.00% | 24.00% | 18.00% |
| Q1 2021 | 11.00% | 16.00% | 15.00% | 6.00% | 5.00% | 27.00% | 20.00% |
| Q4 2020 | 11.00% | 20.00% | 9.00% | 7.00% | 6.00% | 24.00% | 24.00% |
| Q3 2020 | 5.70% | 24.10% | 6.90% | 8.00% | 6.90% | 24.10% | 24.10% |
| Q2 2020 | 5.70% | 23.00% | 6.90% | 8.00% | 6.90% | 26.40% | 23.00% |
| Q1 2020 | 5.50% | 23.10% | 6.60% | 8.80% | 6.60% | 27.50% | 22.00% |
| Q4 2019 | 4.00% | 23.00% | 8.00% | 10.00% | 6.00% | 26.00% | 23.00% |
| Q3 2019 | 3.77% | 22.64% | 9.43% | 9.43% | 5.66% | 26.41% | 22.64% |
| Q2 2019 | 1.40% | 29.72% | 9.11% | 6.13% | 4.41% | 21.75% | 27.49% |
| Q1 2019 | 1.42% | 30.07% | 9.36% | 8.48% | 4.49% | 20.72% | 25.46% |
| Q4 2018 | 1.05% | 30.25% | 9.00% | 7.94% | 3.63% | 21.78% | 26.34% |
| Q3 2018 | 0.79% | 29.62% | 8.48% | 6.60% | 3.71% | 23.67% | 27.12% |
| Q2 2018 | 0.80% | 30.50% | 8.80% | 7.90% | 3.90% | 22.50% | 25.50% |
| Q1 2018 | 1.00% | 30.67% | 7.64% | 7.74% | 3.92% | 23.37% | 25.66% |
| Q4 2017 | 1.14% | 29.36% | 6.75% | 8.21% | 4.68% | 20.58% | 29.28% |
| Q3 2017 | 0.76% | 30.88% | 5.91% | 9.11% | 4.55% | 18.80% | 29.98% |
| Q2 2017 | 0.67% | 33.68% | 6.50% | 8.75% | 4.92% | 18.73% | 26.75% |
| Q1 2017 | 1.00% | 31.83% | 5.64% | 9.03% | 5.43% | 17.92% | 29.14% |
| Q4 2016 | 0.71% | 32.00% | 3.58% | 8.48% | 5.20% | 18.84% | 31.19% |
| Q3 2016 | 1.12% | 31.00% | 4.54% | 7.76% | 5.87% | 21.09% | 28.61% |
| Q2 2016 | 1.02% | 32.18% | 3.69% | 7.15% | 5.18% | 21.60% | 29.18% |
| Q1 2016 | 1.01% | 34.83% | 3.61% | 9.38% | 4.26% | 20.14% | 26.77% |
| Q4 2015 | 0.95% | 33.54% | 3.09% | 9.19% | 5.19% | 20.40% | 27.65% |
| Q3 2015 | 0.95% | 32.97% | 3.18% | 8.05% | 4.52% | 24.65% | 25.67% |
| Q2 2015 | 1.22% | 33.68% | 2.26% | 9.55% | 6.90% | 24.88% | 21.50% |
| Q1 2015 | 1.68% | 33.88% | 2.14% | 11.54% | 6.84% | 24.86% | 19.06% |
| Q4 2014 | 1.42% | 33.67% | 2.26% | 12.31% | 8.45% | 24.67% | 17.22% |
| Q3 2014 | 1.42% | 33.42% | 2.30% | 12.44% | 9.09% | 23.78% | 17.56% |
| Q2 2014 | 1.11% | 34.20% | 2.00% | 12.16% | 9.86% | 23.16% | 17.52% |
| Q1 2014 | 1.17% | 33.13% | 2.34% | 12.17% | 10.33% | 23.95% | 16.91% |
| Q4 2013 | 1.28% | 35.26% | 2.28% | 14.02% | 12.47% | 19.58% | 15.10% |
| Q3 2013 | 1.25% | 35.04% | 2.35% | 14.61% | 13.06% | 19.10% | 14.58% |
| Q2 2013 | 1.31% | 33.43% | 2.63% | 15.42% | 14.05% | 17.54% | 15.62% |
| Q1 2013 | 1.31% | 33.43% | 2.63% | 15.42% | 14.05% | 15.90% | 14.14% |
| Q4 2012 | 1.50% | 33.93% | 2.97% | 14.50% | 14.50% | 19.59% | 13.04% |
| Q3 2012 | 2.32% | 28.30% | 6.70% | 14.22% | 8.35% | 21.17% | 19.00% |
| Q2 2012 | 1.34% | 28.14% | 4.16% | 14.61% | 13.98% | 22.00% | 15.96% |
| Q1 2012 | 1.60% | 28.01% | 4.01% | 13.85% | 14.70% | 20.83% | 17.00% |
| Q4 2011 | 1.14% | 25.06% | 4.12% | 12.13% | 11.63% | 26.48% | 19.45% |
| Q3 2011 | 1.28% | 22.72% | 6.24% | 10.17% | 10.49% | 24.60% | 24.32% |
| Q2 2011 | 1.50% | 23.34% | 8.06% | 10.69% | 9.53% | 25.76% | 21.04% |
| Q1 2011 | 1.50% | 26.95% | 6.99% | 10.50% | 9.46% | 24.59% | 20.00% |
| Q4 2010 | 1.79% | 24.32% | 8.80% | 11.21% | 6.02% | 24.16% | 23.71% |
| Q3 2010 | 1.97% | 20.31% | 8.86% | 11.70% | 6.59% | 24.42% | 26.16% |
| Q2 2010 | 1.90% | 17.29% | 8.53% | 12.36% | 6.58% | 24.29% | 29.05% |
| Q1 2010 | 2.04% | 16.93% | 8.65% | 12.25% | 6.73% | 25.03% | 28.36% |
| Q4 2009 | 2.25% | 15.20% | 7.10%1 | 11.26% | 7.10% | 27.51% | 29.58% |
| Q3 2009 | 2.59% | 13.77% | 5.38% | 10.76% | 6.81% | 29.24% | 31.45% |
| Q2 2009 | 2.42% | 12.89% | 4.79% | 12.21% | 6.49% | 30.57% | 30.63% |
| Q1 2009 | 2.77% | 15.14% | 5.29% | 14.19% | 8.25% | 25.70% | 28.68% |
| Q4 2008 | 2.25% 2 | 23.93% | 3.57% | 12.09% | 6.48% | 26.63% | 25.05% |
| Q3 2008 | 3.31% | 20.03% | 3.33% | 13.14% | 6.54% | 27.27% | 26.39% |
| Q2 2008 | 3.81% | 17.85% | 2.81% | 14.32% | 6.47% | 27.03% | 27.71% |
| Q1 2008 | 3.93% | 13.56% | 2.94% | 14.26% | 6.99% | 30.00% | 28.34% |
*To early 2019, NEX Sectors and Weights were based partly on dividing companies into large or small, and an external survey of companies deemed active in new energy: results adjusted for factors including exposure to new energy and some exchange restrictions. Subsequently, components generally were equally weighted, respective sector weights in accordance with number of Index components assigned to each NEX sector, components and sectors adjusted if necessary as determined by Index Provider and reviewed each quarter.
1 PWS (Power Storage) changed it’s name to ENS (Energy Storage) at the end of the 4th Quarter of 2009.
2 HFC (Hydrogen & Fuel Cells) changed it’s name to ECV (Energy Conversion) at the end of the 4th Quarter of 2008.
Before 2008 We had a different Naming Convention
| HF3 | DS4 | GE4 | PS | RB | RO | RS | RW | SS | |
| Sector Weights At The Start Of Each Quarter* | Hydrogen And Fuel Cells | Demand Side Energy Savings | Generation Efficiency And Smart Distribution | Power Storage | Renewables – Biofuels, Biomass, Waste-To-Energy | Renewables – Other | Renewable – Solar | Renewable – Wind | Services And Suppliers |
| Q4 2007 | 3.68% | 7.56% | 6.28% | 2.42% | 11.99% | 11.25% | 22.87% | 27.17% | 6.78% |
| Q3 2007 | 3.68% | 7.56% | 6.28% | 2.42% | 11.99% | 11.25% | 22.87% | 27.17% | 6.78% |
| Q2 2007 | 4.87% | 7.07% | 5.88% | 3.41% | 12.15% | 12.07% | 19.42% | 28.20% | 6.93% |
| Q1 2007 | 4.87% | 7.07% | 5.88% | 3.41% | 12.15% | 12.07% | 19.42% | 28.20% | 6.93% |
3 HF (Hydrogen And Fuel Cells) became HFC (Hydrogen & Fuel Cells) after 2007 and then changed it’s name to ECV (Energy Conversion) at the end of the 4th Quarter of 2008.
4 DS (Demand Side Energy Savings) and GE (Generation Efficiency And Smart Distribution) were combined into EEF (Energy Efficiency) after 2007.