Search Results for author: Marcin Pitera

Found 7 papers, 0 papers with code

A novel scaling approach for unbiased adjustment of risk estimators

no code implementations9 Dec 2023 Marcin Pitera, Thorsten Schmidt, Łukasz Stettner

The assessment of risk based on historical data faces many challenges, in particular due to the limited amount of available data, lack of stationarity, and heavy tails.

Utility-based acceptability indices

no code implementations3 Oct 2023 Marcin Pitera, Miklós Rásonyi

In this short paper we introduce a new class of performance measures based on certainty equivalents defined via scaled utility functions.

Portfolio Optimization

Estimating value at risk: LSTM vs. GARCH

no code implementations21 Jul 2022 Weronika Ormaniec, Marcin Pitera, Sajad Safarveisi, Thorsten Schmidt

Estimating value-at-risk on time series data with possibly heteroscedastic dynamics is a highly challenging task.

Time Series Time Series Analysis

Estimating and backtesting risk under heavy tails

no code implementations25 Jan 2022 Marcin Pitera, Thorsten Schmidt

While the estimation of risk is an important question in the daily business of banking and insurance, many existing plug-in estimation procedures suffer from an unnecessary bias.

Time Series Time Series Analysis

Discrete-time risk sensitive portfolio optimization with proportional transaction costs

no code implementations8 Jan 2022 Marcin Pitera, Łukasz Stettner

In this paper we consider a discrete-time risk sensitive portfolio optimization over a long time horizon with proportional transaction costs.

Portfolio Optimization

Estimating and backtesting risk under heavy tails

no code implementations20 Oct 2020 Marcin Pitera, Thorsten Schmidt

While the {estimation} of risk is an important question in the daily business of banking and insurance, many existing plug-in estimation procedures suffer from an unnecessary bias.

Time Series Time Series Analysis

Fair Estimation of Capital Risk Allocation

no code implementations26 Feb 2019 Tomasz R. Bielecki, Igor Cialenco, Marcin Pitera, Thorsten Schmidt

In this paper we develop a novel methodology for estimation of risk capital allocation.

Fairness

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