Detecting Greenwashing: Portfolio Look-Through, Holdings versus Marketing and the DWS Case

What you will learn

• What greenwashing means in the EU supervisory definition and why it is a mis-selling problem, not just a marketing problem.
• How to do a portfolio look-through: find the holdings, measure the exposures and compare them with the marketing.
• What the DWS case (2021–2025) shows about the gap between "ESG integration" claims and internal practice.
• A short list of questions to ask about any fund that uses "sustainable", "green" or "ESG" in its name or documents.

Explanation

Greenwashing is making sustainability claims that do not clearly and fairly reflect the real sustainability profile of a product or company; the European Supervisory Authorities used a definition along these lines in their 2023–2024 greenwashing reports. The key word is fairly: a claim can be technically true and still misleading if it creates a wrong overall impression.

Greenwashing in funds usually takes one of four forms:

• Naming: a "Climate Leaders" fund that tracks its parent index with minimal changes (the ESMA fund-naming guidelines from lesson 5 limit this for EU funds).
• Selective disclosure: carbon intensity shown against a benchmark chosen to flatter the fund.
• Process claims: "ESG is integrated into every decision" when analysts can ignore the data without consequence. This was the core of the DWS case.
• Vague words: "responsible", "aware", "conscious" and "future" are defined nowhere and promise nothing.

The tool against all four is the portfolio look-through: looking through the fund wrapper at the actual securities. Every UCITS fund (the EU retail fund standard) publishes full holdings at least twice a year in its reports, and most ETFs publish them daily. With the holdings list you can measure three things:

1. Exposure to excluded activities: add up the weights of holdings the marketing suggests are absent (coal, oil and gas producers in a "fossil-free" fund).
2. Overlap with the parent index: a "sustainable" fund sharing 95 % of its weight with the MSCI World is a conventional fund with a different label.
3. Weighted average carbon intensity (WACI): the sum of each holding's weight times its carbon intensity, in tonnes of CO2-equivalent per million euros (or dollars) of revenue. It is the most common factsheet climate metric and easy to recalculate.

The DWS case. DWS is Deutsche Bank's asset-management subsidiary. In August 2021 its former head of sustainability, Desiree Fixler, said publicly that the firm had overstated how much of its assets were managed with ESG integration. Police searched its Frankfurt offices in May 2022. In September 2023 DWS paid USD 19 million to settle US Securities and Exchange Commission (SEC) charges of materially misleading statements about its ESG integration controls, and in April 2025 it accepted a EUR 25 million fine from the Frankfurt public prosecutor, who found that marketing claims such as calling DWS an ESG "leader" in 2020–2023 did not match reality. DWS itself called its past marketing at times "exuberant". The lesson is not that DWS funds were bad investments; it is that process claims are unverifiable from outside and should weigh little against holdings data.

Worked example

Hypothetical example: the "Clean Horizon Global Equity" fund markets itself as "fossil-free" and "a climate fund". Its factsheet reports a WACI of 206 tCO2e per EUR 1 million of revenue against 250 for its benchmark. You download the holdings list (50 positions) and find the following.

Step 1 – fossil exposure. 3.2 % + 2.5 % + 1.8 % + 1.1 % = 8.6 % of the fund. On a EUR 10,000 investment, EUR 10,000 × 0.086 = EUR 860 is indirectly invested in fossil-fuel value chains. "Fossil-free" is therefore false, whatever the fund's definition.

Step 2 – check the WACI. Simplify the fund into four buckets: 40 % of weight at 50 tCO2e/EUR m, 30 % at 120, 20 % at 300 and 10 % at 900.
WACI = 0.40 × 50 + 0.30 × 120 + 0.20 × 300 + 0.10 × 900 = 20 + 36 + 60 + 90 = 206 tCO2e/EUR m. The factsheet number is correct.

Step 3 – judge the claim. (250 − 206) / 250 = 17.6 % lower than the benchmark: a mild tilt, not a "climate fund" as most buyers understand it. Also, 10 % of the fund produces 90 of the 206 points; the headline hides a few heavy emitters.

Assumptions: invented weights and intensities; real data lag one to two years. Fees, spreads and taxes are ignored.

Common mistake

Practice activity

On paper: a "low-carbon" fund has 70 % of weight at 80 tCO2e/EUR m, 25 % at 200 and 5 % at 1,500; the benchmark WACI is 180. Calculate the fund's WACI, the percentage difference to the benchmark and the share of WACI from the 5 % group. Then judge the claim in one sentence.

Key takeaways

• Greenwashing is a claim that does not fairly reflect the real profile; "technically true" is not a defence.
• The holdings list is the only evidence you can verify yourself; process claims are not verifiable from outside.
• Three look-through checks: excluded-activity weight, overlap with the parent index, and a recalculated WACI.
• The DWS case shows that even a large, regulated manager can be fined for the gap between marketing and practice.

Next step

Next, lesson 8 looks at impact investing and asks the hard question: when does an investment actually change anything in the real world?