Robust retirement and life insurance with inflation risk and model ambiguity

K Park, HY Wong, T Yan - Insurance: Mathematics and Economics, 2023 - Elsevier
We study a robust consumption-investment problem with retirement and life insurance
decisions for an agent who is concerned about inflation risk and model ambiguity. Assuming …

Robust portfolio choice under the 4/2 stochastic volatility model

Y Cheng, M Escobar-Anel - IMA Journal of Management …, 2023 - academic.oup.com
This paper provides the first optimal portfolio analysis for a constant relative risk-averse and
ambiguity-averse investor under the state-of-the-art 4/2 stochastic volatility model in a …

Optimal reinsurance contract and investment strategy for multiple competitive-cooperative insurers and a reinsurer

T Wang, Z Chen, P Yang - IMA Journal of Management …, 2024 - academic.oup.com
Abstract Accepted by: Giorgio Consigli In this article, we consider a reinsurance contract
design by taking into account the joint interests of multiple insurers and a reinsurer. The …

Robust consumption-investment with return ambiguity: A dual approach with volatility ambiguity

K Park, HY Wong - SIAM Journal on Financial Mathematics, 2022 - SIAM
Consider a robust consumption-investment problem for a risk-and ambiguity-averse investor
who is concerned about return ambiguity in risky asset prices. When the investor aims to …

Lasso-based simulation for high-dimensional multi-period portfolio optimization

Z Li, KH Tsang, HY Wong - IMA Journal of Management …, 2020 - academic.oup.com
This paper proposes a regression-based simulation algorithm for multi-period mean-
variance portfolio optimization problems with constraints under a high-dimensional setting …

Robust consumption portfolio optimization with stochastic differential utility

J Pu, Q Zhang - Automatica, 2021 - Elsevier
This paper examines a continuous time intertemporal consumption and portfolio choice
problem with a stochastic differential utility preference of Epstein–Zin type for a robust …

Robust investment for insurers with correlation ambiguity

B Cheng, H Wang, L Zhang - The Quarterly Review of Economics and …, 2024 - Elsevier
This paper investigates the investment decision of insurers when there is ambiguous
correlation between the financial market and the insurance business. The robust decision …

Consumption and portfolio optimization with generalized stochastic differential utility in incomplete markets

J Pu, Q Zhang - Systems & Control Letters, 2024 - Elsevier
This paper examines continuous time intertemporal consumption and portfolio choice
problems of an investor in a generalized stochastic differential utility preference of Epstein …

Dynamic programming principle for stochastic optimal control problem under degenerate G-expectation

X Li - Systems & Control Letters, 2025 - Elsevier
In this paper, we study a stochastic optimal control problem under degenerate G-
expectation. By using implied partition method, we show that the approximation result for …

Two-species competing population dynamics with the population-dependent environmental capacities under random disturbance

H Yoshioka - Theory in Biosciences, 2020 - Springer
We propose and analyze a stochastic competing two-species population dynamics model
subject to jump and continuous correlated noises. Competing benthic algae population …