Published work

Refereed journal articles

The collateral costs of clearing

with Cyril Monnet

Journal of Money, Credit and Banking 53(5), 939–970, 2021

We study three generic clearing arrangements in the presence of two‐sided limited commitment: simple bilateral clearing, segregated collateral clearing through a third party, and—most sophisticated—central counterparty (CCP) clearing. Clearing secures the settlement of obligations from over‐the‐counter forward contracts that smooth the income of risk‐averse traders. Clearing requires collateral to guarantee settlement; this is costly, as it reduces income from investment. More sophisticated clearing arrangements require more collateral. As a result, the welfare gains of CCP clearing may be mostly due to segregation, while mutualization of losses could contribute little to welfare.

BibTeX
@article{monnet_nellen2021,
  author  = {Monnet, Cyril and Nellen, Thomas},
  title   = {The collateral costs of clearing},
  journal = {Journal of Money, Credit and Banking},
  year    = {2021},
  volume  = {53},
  number  = {5},
  pages   = {939--970}
}

Covered bonds, loan growth and bank funding: the Swiss experience since 1932

with Jonas Meuli and Thomas Nitschka

International Finance 24(1), 77–94, 2021

The global financial crisis triggered discussions about what factors constitute a stable mortgage finance system. This paper contributes to these discussions by empirically analysing the Swiss mortgage finance system from a macroeconomic and banking sector balance sheet perspective. Our analysis is based on a novel and near‐comprehensive data set of mortgage bond (Swiss Pfandbrief) issuances over the sample period from 1932 to 2014. The empirical results suggest that growth in the volume of the Swiss Pfandbrief does not induce more loan growth than expected given the state of the economy and that compared with other bank refinancing activities, the Swiss Pfandbrief provides a stabilising source of funding.

BibTeX
@article{meuli_nellen_nitschka2021,
  author  = {Meuli, Jonas and Nellen, Thomas and Nitschka, Thomas},
  title   = {Covered bonds, loan growth and bank funding: the {S}wiss experience since 1932},
  journal = {International Finance},
  year    = {2021},
  volume  = {24},
  number  = {1},
  pages   = {77--94}
}

Covid-19 and regional shifts in Swiss retail payments

with Sébastien Kraenzlin and Christoph Meyer

Swiss Journal of Economics and Statistics 156:14, 2020

This paper analyzes card payments to the retail sector in Switzerland during the COVID-19 crisis. We provide evidence on aggregate effects and regional shifts. Pronounced shifts—which persisted post-lockdown—can be observed from urban to suburban and rural areas and among cantons. Data allow us to identify directly two sources of shifts: “tourists and business travelers” and “e-commerce.” We indirectly identify additional sources: infection risk, lockdown measures, working from home, shopping tourism, and cash substitution. The COVID-19 crisis seems to have reinforced pre-existing trends that may have faster than anticipated effects on the economy. Our analysis underscores the usefulness of real-time card payment data to inform policymakers.

BibTeX
@article{kraenzlin_meyer_nellen2020,
  author  = {Kraenzlin, S{\'e}bastien and Meyer, Christoph and Nellen, Thomas},
  title   = {Covid-19 and regional shifts in {S}wiss retail payments},
  journal = {Swiss Journal of Economics and Statistics},
  year    = {2020},
  volume  = {156},
  pages   = {14}
}

Intraday liquidity facilities, late settlement fee and coordination

single-authored

Journal of Banking and Finance 106, 124–131, 2019

This paper analyses the intraday liquidity management game played in large-value payment systems accounting for a variable and a fixed cost of liquidity. While the liquidity cost is a decisive factor for settlement behaviour, the availability of intraday liquidity until end-of-day matters too, as it mutes late settlement incentives originating from settlement risk. Whether liquidity is provided via overdraft or intraday credit hardly matters. A late settlement fee can both disincentivise settlement coordination or implement early settlement. Its calibration is usually non-trivial with the major exception of a fixed cost and end-of-day availability of intraday liquidity.

BibTeX
@article{nellen2019,
  author  = {Nellen, Thomas},
  title   = {Intraday liquidity facilities, late settlement fee and coordination},
  journal = {Journal of Banking and Finance},
  year    = {2019},
  volume  = {106},
  pages   = {124--131}
}

Confederation debt management since 1970

with Basil Guggenheim and Mario Meichle

Swiss Journal of Economics and Statistics 155:15, 2019

This paper analyzes the Confederation’s debt management. The Confederation actively manages roll over and interest rate risk by increasing bond maturity with increasing marketable debt-to-GDP levels. It further engages in active but asymmetric, one-sided interest rate positioning; i.e., it uses mostly bonds to affect debt maturity and does so only when the interest rate environment is favorable to lock-in interest rates by issuing longer-term bonds. Debt management is mainly driven by marketable debt rather than total debt. Issuing behavior became more regular and demand-oriented during the early 1990s when marketable and total debt increased in tandem.

BibTeX
@article{guggenheim_meichle_nellen2019,
  author  = {Guggenheim, Basil and Meichle, Mario and Nellen, Thomas},
  title   = {Confederation debt management since 1970},
  journal = {Swiss Journal of Economics and Statistics},
  year    = {2019},
  volume  = {155},
  pages   = {15}
}

Interoperability between central counterparties

with Jürg Mägerle

Journal of Financial Market Infrastructures 4(2), 49–71, 2015

In reaction to recent requests for interoperability between central counterparties of European stock markets, regulators have issued new guidelines to contain systemic risk. Our analysis confirms that the currently applied cross-CCP risk management model can be a source of contagion, particularly if applied in multilateral frameworks. While regulators' new guidelines eliminate systemic risk, this comes at the cost of an inefficiently overcollateralised clearing system. We discuss further approaches that contain systemic risk while reducing or eliminating overcollateralisation. Interoperability is of economic importance as it may contribute to the efficiency and safety of a worldwide fragmented clearing infrastructure.

BibTeX
@article{magerle_nellen2015,
  author  = {M{\"a}gerle, J{\"u}rg and Nellen, Thomas},
  title   = {Interoperability between central counterparties},
  journal = {Journal of Financial Market Infrastructures},
  year    = {2015},
  volume  = {4},
  number  = {2},
  pages   = {49--71}
}

Access policy and money market segmentation

with Sébastien Kraenzlin

Journal of Monetary Economics 71, 1–12, 2015

Deviations between interest rates paid in the Swiss franc unsecured money market and the respective Libor rate are analysed for a period spanning the financial crisis. First, banks that have access to sources of secured central bank and interbank funding pay less than other banks. Second, foreign banks (not chartered in Switzerland) pay more than domestic banks. Third, both lines of segmentation are economically relevant but limited due to open access to sources of secured funding. Thus, access policy matters for monetary policy implementation and financial stability.

BibTeX
@article{kraenzlin_nellen2015,
  author  = {Kraenzlin, S{\'e}bastien and Nellen, Thomas},
  title   = {Access policy and money market segmentation},
  journal = {Journal of Monetary Economics},
  year    = {2015},
  volume  = {71},
  pages   = {1--12}
}

Daytime is money

with Sébastien Kraenzlin

Journal of Money, Credit and Banking 42(8), 1689–1702, 2010

Based on trade data from the Swiss franc overnight interbank repo market, we gain valuable insights into the daytime value of money. In analogy to Baglioni and Monticini (2008), we provide evidence that an implicit intraday money market exists. We further show that the introduction of foreign exchange settlement system, Continuous Linked Settlement, increased the implicit value of intraday liquidity during settlement cycle hours, thus providing further evidence of the cost of immediacy. Finally, we provide evidence that during the financial market turmoil the implicit intraday interest in a secured money market was less affected than that in an unsecured money market.

BibTeX
@article{kraenzlin_nellen2010,
  author  = {Kraenzlin, S{\'e}bastien and Nellen, Thomas},
  title   = {Daytime is money},
  journal = {Journal of Money, Credit and Banking},
  year    = {2010},
  volume  = {42},
  number  = {8},
  pages   = {1689--1702}
}

Swiss Interbank Clearing

with Daniel Heller and Andy Sturm

Financial Markets and Portfolio Management 14(4), 2000

BibTeX
@article{heller_nellen_sturm2000,
  author  = {Heller, Daniel and Nellen, Thomas and Sturm, Andy},
  title   = {{S}wiss {I}nterbank {C}learing},
  journal = {Financial Markets and Portfolio Management},
  year    = {2000},
  volume  = {14},
  number  = {4}
}

Book chapters and thesis

Budget control and payment behavior: evidence from Switzerland

with Till Ebner and Jörn Tenhofen

In Cash in the Age of Payment Diversity, International Cash Conference, Deutsche Bundesbank, 2020

Does SIC need a heart pacemaker?

with Robert Oleschak

In Diagnostics for the Financial Markets, Simulator Seminar Proceedings 2009–2011, 2012

Essays in Payment Economics

single-authored

PhD thesis, University of Bern, 2011