The impact of derivatives hedging on the stock market: Evidence from Taiwan’s covered warrants market

We examine the impact of derivatives hedging on the spot market using accurate hedge ratios of covered warrants traded in the Taiwan Stock Exchange (TWSE). Results present significant positive abnormal returns and trading volumes before the announcement of a warrant’s issuance, and the effect is stronger when the hedging demand is larger. Moreover, a significantly positive relationship exists between stock return volatility and the price elasticity of hedging demand. Finally, we observe a significantly negative price effect upon the underlying stock after a call warrant has expired in-the-money due to the liquidation of hedging portfolios.     

论企业风险对冲与管理者激励

本文根据委托代理理论,利用风险管理决策的效用原则,分析企业管理者不同薪酬制度下的风险偏好和风险管理决策;进一步说明股东可以通过设计不同的管理者薪酬计划,校正管理者在风险管理决策中的利益动机,进而使管理者制定的风险管理决策符合股东价值最大化目标。     

A mixed C-vine copula model for hedging price and volumetric risk in wind power trading

When energy trading companies enter into long-term agreements with wind power producers, where a fixed price is paid for the fluctuating production, they are facing a joint price and volumetric risk. Since the pay-off of such agreements is non-linear, a hedging portfolio would ideally consist of not only forwards, but also a basket of e.g. call and put options. Illiquidity and an almost non-existent market for options challenge however the optimal hedging of joint price and volumetric risk in many market places. Here, we consider the case of the Danish power market, and exploit its strong positive correlation with the much more liquid German market to construct a proxy hedge. We propose a three-dimensional mixed vine copula to model the evolution of the Danish and German spot electricity prices and the Danish wind power production. We construct a realistic hedging portfolio by identifying various instruments available in the market, such as real options in the form of the right to transfer electricity across the border and the right to convert electricity to heat. Using the proposed vine copula to determine optimal hedging decisions, we show that significant benefits are to be drawn by extending the hedging portfolio with the proposed instruments.     

Dynamic spillover and connectedness between oil futures and European bonds

This paper examines the spillovers and connectedness between crude oil futures and European bond markets (EBMs) having different maturities. We also analyze the hedging effectiveness of crude oil futures-bond portfolios in tranquil and turbulent periods. Using the spillovers index of Diebold and Yilmaz (2012, 2014), we show evidence of time-varying spillovers between markets under investigations, which varies between 65% and 83%. Moreover, three-month, six-month, one-year, three-year and thirty-year bonds and crude oil futures are net receivers of risk from other markets, whereas the remaining bonds are net contributors of risk to the other markets. Crude oil futures receive more risk from long-term than short-term bonds. Moreover, the magnitude of risk transmission is low for the pre-crisis and economic recovery periods. Crude oil futures market contributes significantly to the risk of other markets during the oil crisis and Brexit period. A portfolio risk analysis shows that that most investments should be in oil rather than bonds (except the short-term bonds). The hedge ratio is sensitive to market conditions, where the cost of hedging increases during GFC and ESDC period. Finally, a crude oil futures-bond portfolio offers the best hedging effectiveness during the COVID-19 pandemic period.     

Tracking performance of VIX futures ETPs

We find that, at the daily level, none of the VIX futures Exchange-Traded Products (ETPs) track their intrinsic values perfectly, although the tracking improves at the weekly and monthly frequency. We show that all products tracking deviations are driven by mainly driven by limits to arbitrage, measured by market conditions, liquidity and transaction costs. Exchange-Traded Funds’ (ETFs’) deviations are more significantly related to fund flows, which shows authorized participants taking advantage of arbitrage opportunities by creating/redeeming ETF units. The Exchange-Traded Notes (ETNs) do not have this mechanism, creation and redemption is reliant on the issuers and delayed, so their deviations are less related to flows.     

Real effects of governmental accounting standards: Evidence from GASB statement No. 53 – Accounting and financial reporting for derivative instruments

GASB Statement No. 53, Accounting and Financial Reporting for Derivative Instruments, (GASB 53) significantly altered U.S. governmental sector accounting of derivative instruments by mandating the recognition of hitherto off-balance sheet derivative instruments in the government-wide statement of net assets and requiring that ineffective hedges be clearly identified. These requirements have an unfavorable financial statement impact for municipalities with net negative fair value derivative positions and municipalities holding ineffective hedges. Using a hand-collected, comprehensive dataset of municipal derivatives, we examine whether the level of U.S. municipal derivative holdings changed following the adoption of GASB 53. Consistent with GASB 53 affecting municipal officials’ derivative decisions, we find a significant post-GASB 53 reduction in derivative holdings for municipalities with net negative fair value derivative positions and ineffective hedges. Our findings suggest that governmental accounting regulations could affect real decisions of municipal officials and therefore could potentially have public policy implications beyond the provision of information to stakeholders.     

The role of the board and the audit committee in corporate risk management

This paper examines the impact of corporate governance on corporate risk-management activities in S&P 500 firms over the period 2004–2010 by measuring the characteristics of the board directors and audit committee. Our results show that the board of directors, especially the audit committee, plays an important role in the firm’s hedging decisions, including whether to hedge and to what extent. Such evidence is even stronger in high-leveraged firms with large risk-shifting incentives. These results are robust to the consideration of endogenous concerns, a board corporate governance index, and industrial effects. Our study contributes to the literature by showing the influential role of the audit committee on corporate risk management.     

Hedging futures performance with denoising and noise-assisted strategies

Noise processing is very important to improve hedging effectiveness. However, the existing methods are mainly considered from the view of denoising strategy, and the research on noise-assisted strategy is limited. In this paper, a framework that includes both denoising and noise-assisted strategies is proposed to comprehensively analyze the impact of noise proceeding on hedging effectiveness. In detail, the EMD technology is utilized to decompose the futures and spot original returns. Then, the decomposition terms are stepwise removed or added in the opposite way to obtain the denoised and noise-assisted returns. Finally, under the minimum-CVaR framework, the dynamic hedged portfolios based on original and processed returns are constructed to test the hedging effectiveness. Based on the daily prices of CSI300, S&P500, WTI crude oil, and gold futures contract which range from February 9, 2007, to January 10, 2020, the empirical results indicate that both denoising and noise-assisted hedging strategies can decrease CVaR compare with using original return. Furthermore, denoising or adding high-intensity noise has better hedging performance than low-intensity noise, adding uncorrelated noise performs better than adding correlated noise Robustness results by changing confidence level validate the above conclusions.     

Information content and the contractual nature of hedging derivative incomes

In a sample of 87 banks representing 631 bank-years for the period 1996–2003, we examine whether information content of hedging derivative incomes is predicated on the contractual nature of the derivative. Of particular interest are the different abnormal trading volume reactions to incomes arising from executory contracts (i.e., cash flow and net investment hedges) and incomes arising from nonexecutory contracts (i.e., fair value hedges). We find a positive and significant relationship between two alternative measures of abnormal trading volume and incomes arising from cash flow and net investment hedges. The results are robust in an equity valuation framework. Our findings suggest that derivative incomes are informative, notably those incomes that are related to executory contracts. An implication for standard setters is that the complex rules for disaggregating incomes on hedging derivatives provide valuable information to the market.