Lei Hua

Nov 13, 2024 | mdpi.com | Lu Zhang |Lei Hua

1. IntroductionThe efficient markets theory (EMT) tells us that stock prices have already reflected all the information and suggests that returns are not predictable in an efficient market.

Sep 6, 2024 | mdpi.com | Liang Qiao |Tao Shen |Lei Hua |Hongna Li

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Nov 27, 2023 | jamanetwork.com | Lei Hua

JAMA Neurology Clinical Challenge A Young Woman With Hypertonia, Severe Scoliosis, and Encephalopathy A 31-year-old woman was evaluated for generalized dystonia, dysarthria, dysphagia, severe scoliosis, and motor development disorder that began in her childhood. Born by cesarean delivery to nonconsanguineous parents, she developed difficulties with head control, standing, and feeding at age 10 months.

Nov 10, 2023 | mdpi.com | Lei Hua

1. IntroductionDependence modeling among financial assets has been an important topic of research in quantitative risk management. For daily returns, there are many papers on the use of copulas to model dependence structures across different financial assets, such as Dißmann et al. (2013) and Krupskii and Joe (2020), among many others. However, for intraday financial risks, there has not yet been much work conducted.