4 papers
E-backtesting
Qiuqi Wang, Ruodu Wang, Johanna Ziegel
In the recent Basel Accords, the Expected Shortfall (ES) replaces the Value-at-Risk (VaR) as the standard risk measure for market risk in the banking sector, making it the most imp…
Comparative e-backtests for general risk measures
Zhanyi Jiao, Qiuqi Wang, Yimiao Zhao
Backtesting risk measures is a central task in financial regulation. While standard backtests evaluate whether a forecasting model is statistically consistent with observed losses,…
Lambda Expected Shortfall
Fabio Bellini, Muqiao Huang, Qiuqi Wang +1
The Lambda Value-at-Risk (Lambda-VaR) is a generalization of the Value-at-Risk (VaR), which has been actively studied in quantitative finance. Over the past two decades, the Expect…
Cash-subadditive risk measures without quasi-convexity
Xia Han, Qiuqi Wang, Ruodu Wang +1
In the literature on risk measures, cash subadditivity was proposed to replace cash additivity, motivated by the presence of stochastic or ambiguous interest rates and defaultable…