Duration management on the Swiss bond market. Now sustainable, too, thanks to ESG indices.

For years, a negative interest rate environment has dominated even the Swiss market. And the challenges facing the market will continue to grow in the future. If the major central banks continue to withdraw support after more than a decade of providing it, this can result in increased volatility on the interest and credit markets.

September 6, 2022

Fabio von Dach

Portfolio Manager Index Solutions Fixed Income

Duration management makes this kind of environment more manageable because it allows investors to react to different market conditions. If an ESG filter¹ is used, risks can be reduced even further. Fueled by the negative interest rate environment, issuers have tended to issue long-term bonds in recent years.

These were subsequently included in bond indices, leading to extended durations2 or elevated interest rate risks. Since its launch at the beginning of 2007, the SBI® AAA-BBB has seen durations rise continuously from 5.6 to 6.8. The index reached its lowest duration of 5.03 in May 2009 and its highest of 7.90 in August 2019.

Figure 1: Duration trend of the SBI® AAA-BBB

Figure 1

On June 17, 2022, the Swiss National Bank raised its key rate for the first time in over a decade. Bond indices are reacting much more sensitively to high inflation and rising interest rates due to the lengthening durations seen in recent years.

But the current interest rate environment is not the only challenge investors face. A shift is also underway toward sustainability. For investors, sustainable investing means taking environmental, social, and governance (ESG) factors into account when making investment decisions, and in the process identifying new opportunities and new risks3. This paves the way to better risk-adjusted returns4 in the long run.

Since the beginning of last year, SIX has been offering indices that take into account the sustainability criteria listed below for the Swiss equity market (see text box: The SIX ESG methodology) and are very widely accepted on the Swiss market.

The SIX ESG methodology


  • ESG data for corporate issuers are based on the ESG Impact Rating from Inrate. Domiciled in Switzerland, Inrate has existed for over 30 years and covers around 99% of the CHF bond market.
  • The valuation incorporates not only the latest sustainability analysis but also the impact of production and products on environment and society throughout the entire product life cycle.
  • The ESG Impact Ratings from Inrate are expressed on a twelve-point scale ranging from A+, A, A–, etc. to D–, with A+ being the best grade and D– being the worst.

Exclusion recommendations of SVVK-ASIR

  • The Swiss Association for Responsible Investments (SVVK) compiles a recommended exclusion list of companies operating in the areas of antipersonnel mines, cluster munitions, or nuclear weapons, as well as on the basis of conduct.
  • Exclusion is perceived by the SVVK as the last resort when dialog with a problematic company has failed to yield any improvement.
  • The exclusion list is currently accessible to the public and can be viewed on the website.

SBI® ESG selection procedure

  • SIX includes issuers in its SBI® ESG indices if they have an ESG Impact Rating of C+ or higher and generate less than 5% of their revenue in the controversial sectors indicated.
  • In a second step, issuers are subjected to norm-based screening that checks conformity with SVVK requirements. Companies on the SVVK exclusion list are disqualified from the index in the process.
  • If an issuer that is not covered by the SVVK issues a new bond, Inrate performs an ad-hoc analysis to determine the bond’s suitability for the SBI® ESG indices.

Credit Suisse Index Solutions is one of the largest providers of index funds on bonds in Switzerland. Approximately CHF 9.5 bnare invested in the largest index fund on the SBI® AAA-BBB (as of May 31, 2022). Last year saw the launch of the first fund on an SBI® ESG AAA-BBB index with CSIF (CH) Bond Switzerland AAA-BBB ESG Blue. Since the fund was launched, its assets have already grown to over CHF 1.8 bn (as of May 31, 2022).

At the end of May 2022, the CSIF (CH) Bond Switzerland AAABBB 1–5 ESG Blue was added to the sustainable bond fund offering. The fund replicates the SBI® ESG AAA-BBB 1–5 Index and has a shorter duration than CSIF (CH) Bond Switzerland AAA-BBB ESG Blue. In an environment of rising interest rates and high inflation, this can be extremely advantageous since yields on bond portfolios are less sensitive to interest rate hikes.

Composition of the index

Composition of the index The Swiss Bond Index (SBI®) has been published since 2007 and is the most frequently used reference index for the Swiss bond market. The SBI® ESG AAA-BBB provides valuable macroeconomic insights into the Swiss capital market. It supplies information on the current price level and expected future yields. The index also sheds light on borrowers’ origins and creditworthiness as well as on the average residual maturity of stock-exchange-listed bonds. It thus forms a suitable basis for the SBI® ESG indices.

The SBI® AAA-BBB ESG is one of the most important benchmarks for the Swiss bond market that incorporates ESG criteria. The SBI® ESG AAA-BBB 1–5 is a great choice for investors who are seeking a broad benchmark with a shorter duration. It replicates the price trend of bonds denominated in Swiss francs with a minimum rating of BBB and a residual maturity of one to five years that are listed on the SIX Swiss Exchange. However, additional ESG criteria are taken into account compared with the underlying index, the SBI® AAABBB 1–5.

Applying the three-stage ESG selection process of the SBI® ESG AAA-BBB results in 75 issuers being excluded out of a total of 356 (21%)5.

61 issuers are disqualified from the index based on their poor ESG rating, and an additional four issuers due to the revenue they earn in critical sectors6. The remaining ten issuers are excluded due to a lack of data. This leaves 281 issuers. Norm-based screening does not result in any exclusions because no issuer is included on the SVVK exclusion list.

The similar composition of the two indices (see Table 1) means that the durations of the two funds are almost identical. Investors who opt for ESG therefore do not have to accept either a lower rating or a markedly lower yield to maturity.

Table 1: Index features

Number of stocks 1,580 1,386 726 598
ESG rating B (8.13) B (8.46) B (7.63) B (8.13)
Duration 6.99 7.27 2.83 2.87
Yield to maturity 1.30% 1.29% 0.95% 0.92%
Average credit rating AA AA AA AA

Source: SIX. Data as of May 31, 2022. The shown yield-to-maturity is calculated as of May 31, 2022 and does not take into account costs, changes in the portfolio, market fluctuations and potential defaults. The yield to maturity is an indication only and is subject to change.

Figure 2: Index sector weightings

Figure 2

The SBI® ESG AAA-BBB has a diversified sector distribution, whereby the proportion of corporate bonds is slightly lower than for the non-ESG version at 25% versus 28% (see Figure 2). The proportion of government bonds and government-related bonds is, however, slightly higher at 39% (compared with 37% for SBI® AAA-BBB).

The picture is similar for the SBI® AAABBB 1–5 and the SBI® ESG AAA-BBB 1–5. Differences are also identifiable between the SBI® AAA-BBB and the SBI® AAA-BBB 1–5. The indices with shorter durations exhibit a lower allocation to government bonds and government-related bonds as well as to collateralized bonds, while corporate bonds are weighted slightly higher.

Most exclusions due to poor ESG ratings occur in the BBB segment (see Figure 3). This leads to a lower weighting of the BBB segment in the SBI® ESG AAA-BBB and SBI® ESG AAA-BBB 1–5 compared with the SBI® AAA-BBB or SBI® AAA-BBB 1–5, respectively.

Differences in sector allocation between the standard index and the subindex with the lower duration thus also affect the ratings distribution. The SBI® AAA-BBB 1–5 and its sustainable counterpart have a lower weighting in the AAA segment and a significantly higher weighting in the BBB segment.

Figure 3: Index credit rating

Figure 3

The SBI® ESG AAA-BBB Index exhibits slightly higher volatility compared with the underlying index while achieving a comparable yield. However, there is barely any difference in the yield to maturity between the two indices at 1.30% for the SBI® AAA-BBB and 1.29% for the SBI® ESG AAA-BBB (see Table 2). The ESG index has recorded a low tracking error of 0.2% over the last three years. The exclusions do not result in any significant deviations in the risk/return profile for the SBI® ESG AAA-BBB 1–5 versus the underlying index. The tracking error is likewise low.

Index Solutions

Credit Suisse Index Funds, or CSIF for short, has stood for precision, daily liquidity, and minimized investment costs since 1994.

Table 2: Risk/return profile

  YTD 3 months 1 year 3 years
SBI® AAA-BBB –8.5% –5.2% –8.7% –3.1%
SBI® ESG AAA-BBB –8.7% –5.5% –8.9% –3.2%
SBI® AAA-BBB 1–5 –3.4% –2.8% –3.8% –1.4%
SBI® ESG AAA-BBB 1–5 –3.3% –2.7% –3.7% –1.4%
SBI® AAA-BBB 2.8% 3.8% 4.4% 5.0%
SBI® ESG AAA-BBB 2.9% 4.0% 4.5% 5.1%
SBI® AAA-BBB 1–5 1.3% 1.5% 1.7% 2.2%
SBI® ESG AAA-BBB 1–5 1.2% 1.6% 1.6% 2.1%
Tracking error
SBI® ESG AAA-BBB 0.3% 0.3% 0.2% 0.2%
SBI® ESG AAA-BBB 1–5 0.3% 0.1% 0.2% 0.2%

Source: SIX. Data as of May 31, 2022.

An empirical comparison in particular (see Figure 4) shows that the ESG filter does not have a significant impact on the economic characteristics of the index. Since the inception of ESG indices on December 31, 2016, yields have been almost identical to those of standard indices. There are no identifiable material deviations.

Figure 4: Index yields

Figure 4

In summary, it is evident that both ESG indices are very close to their respective underlying benchmarks. Given the negligible deviations in the weightings of the sectors and the ESG and credit ratings, the key figures are virtually identical and the tracking error is low. Therefore, it is viable to consider the sustainable option.

The demand for ESG solutions on the Swiss market has grown sharply in recent years and the offering is expandingcontinuously. Credit Suisse Asset Management already offers a broad range of ESG products. There are now 32 index funds and ETFs with ESG benchmarks and combined fund assets of CHF 23.6 bn under management (as of June 2022).

Both of the SIX indices presented are replicated by CSIF (CH) Bond Switzerland AAA-BBB ESG Blue or the recently launched CSIF (CH) Bond Switzerland AAA-BBB 1–5 ESG Blue. Combining both funds offers investors the opportunity to incorporate duration management into their portfolio: the duration can be managed to run between 2.87 and 7.27, thereby reducing interest rate risk in the process.

Figure 5: Individual management of target duration

Figure 5: Individual management of target duration

Combining the two subfunds allows the investor to achieve the desired target duration.

Example (see Figure 5): If an investor is trying to reach a duration of 5, they can do this by investing 48% in CSIF (CH) Bond Switzerland AAA-BBB ESG Blue and 52% in CSIF (CH) Bond Switzerland AAA-BBB 1–5 ESG Blue. Allocation to CSIF (CH) Bond Switzerland AAA-BBB 1–5 ESG Blue would not only reduce the duration but would also translate into a higher weighting of corporate bonds to the detriment of government bonds and government-related bonds.

The upshot is a higher weighting in the BBB segment and a lower weighting in the AAA segment. This can ultimately result in a higher credit risk as well as higher premiums in relation to the assumed risk. 

Coming soon

Fund name Class Underlying index Bloomberg Ticker (Index) Issuing fees in % Redemption fees in % ISIN CSIF Ongoing charges in %
CSIF (CH) BondSwitzerland AAA-BBBESG Blue QB SBI® ESGAAA-BBB (TR) SBESGT 0.35 0.00 CH0597394557 0.11
FB CH0597394565 0.18
ZB CH0597394540 0.01
CSIF (CH) BondSwitzerland AAA-BBB 1–5ESG Blue QA SBI® ESGAAA-BBB 1–5 (TR) SESG5T 0.25 0.00 CH1189247237 0.11
QB CH1181738381 0.11
ZB CH1181738365 0.01

The investment promoted in this marketing material concerns the acquisition of units or shares in a fund and not of any underlying assets. The underlying assets are owned by the fund only. If the currency of a financial product and/or its costs is different from your reference currency, the return and cost may increase or decrease as a result of currency fluctuations. 

General risks of index funds

  • The fund does not offer any capital protection. Investors may lose some or all of their invested capital.
  • The funds’ investments are exposed to market fluctuations.
  • The funds do not significantly outperform their benchmark indices.
  • Bonds are subject to a risk of default. If the issuer defaults, investors may lose some or all of their invested capital.

The full offering documentation including complete information on risks may be obtained free of charge from a Credit Suisse representative or where available via Fundsearch (

Fábio von Dach

Get in touch with Asset Management

Contact us to learn about exciting investment opportunities. We are here to help you achieve your investment goals.

1 ESG stands for environmental (E), social (S), and governance (G). For further information about the ESG investment criteria and the sustainability-related aspects of the fund, please read the fund’s legal and regulatory documents (e.g. its prospectus) and visit In addition to sustainability-related aspects, any decision to invest in the fund should take into account all of the fund’s objectives and characteristics as described in its prospectus or the information which is to be disclosed to investors in accordance with applicable regulations.
2 Duration is a measure of the interest rate risk of a bond based on the term, yield, coupon, or conditions governing early redemption. These varying factors are summarized in a figure that measures how sensitive the bond is to potential interest rate changes and how its value may respond.
3 See also
4 Source: MSCI: ESG and Performance,
5 Examples of excluded issuers include Shell International, Total Energies, Kernkraftwerk Gösgen, and Zurich Airport
6 For more information please click here.

You cannot invest in an index. The index returns shown are not the results of actual trading in investable assets/securities. Investors that pursue a strategy similar to an index may achieve lower or higher returns and must take the associated costs into account. Past performance does not predict future returns. Neither simulated nor historical performance is a reliable indicator for current or future performance.


Source: Credit Suisse, unless otherwise specified.
Unless noted otherwise, all illustrations in this document were produced by Credit Suisse Group AG and/or its affiliates with the greatest of care and to the best of its knowledge and belief.

This material constitutes marketing material of Credit Suisse Group AG and/or its affiliates (hereafter "CS"). This material does not constitute or form part of an offer or invitation to issue or sell, or of a solicitation of an offer to subscribe or buy, any securities or other financial instruments, or enter into any other financial transaction, nor does it constitute an inducement or incitement to participate in any product, offering or investment. This marketing material is not a contractually binding document or an information document required by any legislative provision. Nothing in this material constitutes investment research or investment advice and may not be relied upon. It is not tailored to your individual circumstances, or otherwise constitutes a personal recommendation, and is not sufficient to take an investment decision. The information and views expressed herein are those of CS at the time of writing and are subject to change at any time without notice. They are derived from sources believed to be reliable. CS provides no guarantee with regard to the content and completeness of the information and where legally possible does not accept any liability for losses that might arise from making use of the information. If nothing is indicated to the contrary, all figures are unaudited. The information provided herein is for the exclusive use of the recipient. The information provided in this material may change after the date of this material without notice and CS has no obligation to update the information. This material may contain information that is licensed and/or protected under intellectual property rights of the licensors and property right holders. Nothing in this material shall be construed to impose any liability on the licensors or property right holders. Unauthorised copying of the information of the licensors or property right holders is strictly prohibited. The full offering documentation including, the prospectus or offering memorandum, the Key Investor Information Document (KIID), the Key Information Document (KID), the fund rules, as well as the annual and bi-annual reports ("Full offering documentation"), as the case may be, may be obtained free of charge in one of the languages listed below from the legal entity/entities indicated below and where available via Fundsearch ( Information on your local distributors, representatives, information agent, paying agent, if any, and your local contacts in respect of the investment product(s) can be found below. The only legally binding terms of any investment product described in this material, including risk considerations, objectives, charges and expenses are set forth in the prospectus, offering memorandum, subscription documents, fund contract and/or any other fund governing documents. For a full description of the features of the products mentioned in this material as well as a full description of the opportunities, risks, and costs associated with the respective products, please refer to the relevant underlying securities prospectuses, sales prospectuses, or other additional product documents, which we will be pleased to provide to you at any time upon request. The investment promoted in this marketing material concerns the acquisition of units or shares in a fund and not of any underlying assets. The underlying assets are owned by the fund only. Some of the product(s) included in this material may not be registered and/or available for purchase in your country of domicile. If in doubt whether the product(s) is/are registered for distribution in your country, please consult your relationship manager or locally registered distributor. If investment products have not been registered with, or authorized by a supervisory authority, certain investor protections provided under supervisory laws and regulations may not be provided. This material may not be forwarded or distributed to any other person and may not be reproduced. Any forwarding, distribution or reproduction is unauthorized and may result in a violation of the U.S. Securities Act of 1933, as amended (the “Securities Act”). The securities referred to herein have not been, and will not be, registered under the Securities Act, or the securities laws of any states of the United States and, subject to certain exceptions, the securities may not be offered, pledged, sold or otherwise transferred within the United States or to, or for the benefit or account of, U.S. persons. In addition, there may be conflicts of interest with regards to the investment. In connection with the provision of services, Credit Suisse AG and/or its affiliates may pay third parties or receive from third parties, as part of their fee or otherwise, a one-time or recurring fee (e.g., issuing commissions, placement commissions or trailer fees). Prospective investors should independently and carefully assess (with their tax, legal and financial advisers) the specific risks described in available materials, and applicable legal, regulatory, credit, tax and accounting consequences prior to making any investment decision. The alternative investment fund manager or the (UCITS) management company, as applicable, may decide to terminate local arrangements for the marketing of the shares/units of a fund, including terminating registrations or notifications with the local supervisory authority. A summary of investor rights for investing into European Economic Area domiciled investment funds managed or sponsored by Credit Suisse Asset Management can be obtained in English via, local laws relating to investor rights may apply." Copyright © 2022 CREDIT SUISSE GROUP AG and/or its affiliates. All rights reserved

Management Company (Fondsleitung): Credit Suisse Funds AG1, Uetlibergstrasse 231, CH-8070 Zurich I Custodian, Distributor: Credit Suisse (Switzerland) Ltd., Paradeplatz 8, CH-8001 Zurich I Distributor: Credit Suisse AG, Paradeplatz 8, CH-8001 Zurich I Distributor: Credit Suisse Asset Management (Switzerland) Ltd., Kalandergasse 4, CH-8045 Zurich I Language versions available: German, English, French, and/or Italian I Supervisor (Entity of Registration): Swiss Financial Market Supervisory Authority (FINMA)
1 Legal entity, from which the full offering documentation, the key investor information document (KIID), the fund rules, as well as the annual and bi-annual reports, if any, may be obtained free of charge.