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Jinxia Zhu

Publications and source records attributed to Jinxia Zhu.

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Balancing Shareholder Value and Financial Stability under a Reduced-Form Liquidation Model

Modern resolution and prudential regimes increasingly wind up a distressed firm not at a single hard threshold but through a graduated, state-dependent process. We study how the design of such a regime shapes the trade-off between shareholder value and financial stability for a firm whose surplus follows a general diffusion. Forced liquidation is modelled in reduced form, arriving at a surplus-dependent hazard rate that rises as the firm's position deteriorates. The framework has three regions: an unregulated region where dividends may be paid, a regulated region where solvency requirements prohibit distributions, and a distress region in which the firm faces the liquidation hazard. To quantify shareholder value we solve the resulting singular stochastic control problem: which is to maximise the expected present value of distributions until liquidation. We establish a verification theorem, prove that a barrier strategy is optimal, and obtain tractable expressions for the value function and the expected survival time, so that alternative designs can be compared at low cost. We show that a distress region placed solely below or solely above the classical ruin threshold does not consistently improve both shareholder value and firm survival, whereas combining the two yields a Pareto improvement. Regulatory design is decisive.

q-fin.MF

On effects of present-bias on carbon emission patterns towards a net zero target

This paper explores the optimal policy for using an allocated carbon emission budget over time with the objective to maximize profit, by explicitly taking into account present-biased preferences of decision-makers, accounting for time-inconsistent preferences. The setup can be adapted to be applicable for either a (present-biased) individual or also for a company which seeks a balance between production and emission schedules. In particular, we use and extend stochastic control techniques developed for optimal dividend strategies in insurance risk theory for the present purpose. The approach enables a quantitative analysis to assess the effects of present-bias, of sustainability awareness, and the efficiency of a potential carbon tax in a simplified model. In some numerical implementations, we illustrate in what way a higher degree of present-bias leads to excess emission patterns, while placing greater emphasis on sustainability reduces carbon emissions. Furthermore, we show that for low levels of carbon tax, its increase has a positive effect on curbing emissions, while beyond a certain threshold that marginal impact gets considerably weaker.

q-fin.MF

Value Maximization under Stochastic Quasi-Hyperbolic Discounting

We investigate a value-maximizing problem incorporating a human behavior pattern: present-biased-ness, for a firm which navigates strategic decisions encompassing earning retention/payout and capital injection policies, within the framework of Lévy processes. We employ the concept of stochastic quasi-hyperbolic discounting to capture the present-biased inclinations and model decision making as an intra-personal game with sophisticated decision-makers. Our analysis yields closed-form solutions, revealing that double-barrier strategies constitute Markov equilibrium strategies. Our findings reveal that firms, influenced by present-biased-ness, initiate dividend payments sooner, diminishing overall value compared to scenarios without present-biased-ness (under exponential discounting). We also discuss bailout optimality, providing necessary and sufficient conditions. The impact of behavioral issues is examined in the Brownian motion and jump diffusion cases.

math.OC

Optimal financing and dividend distribution in a general diffusion model with regime switching

We study the optimal financing and dividend distribution problem with restricted dividend rates in a diffusion type surplus model where the drift and volatility coefficients are general functions of the level of surplus and the external environment regime. The environment regime is modeled by a Markov process. Both capital injections and dividend payments incur expenses. The objective is to maximize the expectation of the total discounted dividends minus the total cost of capital injections. We prove that it is optimal to inject capitals only when the surplus tends to fall below zero and to pay out dividends at the maximal rate when the surplus is at or above the threshold dependent on the environment regime.

math.OC

Optimal dividend control for a generalized risk model with investment incomes and debit interest

This paper investigates dividend optimization of an insurance corporation under a more realistic model which takes into consideration refinancing or capital injections. The model follows the compound Poisson framework with credit interest for positive reserve, and debit interest for negative reserve. Ruin occurs when the reserve drops below the critical value. The company controls the dividend pay-out dynamically with the objective to maximize the expected total discounted dividends until ruin. We show that that the optimal strategy is a band strategy and it is optimal to pay no dividends when the reserve is negative.

math.OC