Ruin probability for stochastic flows of financial contract under phase-type distribution

Franck Adékambi, Kokou Essiomle

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


This paper examines the impact of the parameters of the distribution of the time at which a bank’s client defaults on their obligated payments, on the Lundberg adjustment coefficient, the upper and lower bounds of the ruin probability. We study the corresponding ruin probability on the assumption of (i) a phase-type distribution for the time at which default occurs and (ii) an embedding of the stochastic cash flow or the reserves of the bank to the Sparre Andersen model. The exact analytical expression for the ruin probability is not tractable under these assumptions, so Cramér Lundberg bounds types are obtained for the ruin probabilities with concomitant explicit equations for the calculation of the adjustment coefficient. To add some numerical flavour to our results, we provide some numerical illustrations.

Original languageEnglish
Article number53
Issue number2
Publication statusPublished - Jun 2020


  • Coxian distribution
  • Erlang distribution
  • Moment generating function
  • Phase-type distribution
  • Ruin probability
  • Sparre Andersen model
  • Stochastic cash flow

ASJC Scopus subject areas

  • Accounting
  • Economics, Econometrics and Finance (miscellaneous)
  • Strategy and Management


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