手法を比較

	Value at Risk (VaR)（リスク価値）	条件付きバリュー・アット・リスク（期待ショートフォール）
分野	ファイナンス	ファイナンス
系統	Regression model	Regression model
提唱年	2007	2000
提唱者	Jorion (textbook benchmark); popularised by RiskMetrics / J.P. Morgan	Rockafellar & Uryasev (2000); Acerbi & Tasche (2002)
種類	Financial risk measure	Coherent tail-risk measure
原典	Jorion, P. (2007). Value at Risk: The New Benchmark for Managing Financial Risk (3rd ed.). McGraw-Hill. ISBN: 978-0071464956	Rockafellar, R. T. & Uryasev, S. (2000). Optimization of Conditional Value-at-Risk. Journal of Risk, 2(3), 21-41.
別名	VaR, value-at-risk, delta-normal VaR, historical simulation VaR	CVaR, expected shortfall, average value-at-risk, tail VaR
関連	5	5
概要	Value at Risk is a financial risk measure that estimates the maximum loss a position or portfolio could suffer over a fixed holding period at a given confidence level. It is the standard benchmark in risk management and regulatory capital calculations, developed in the textbook tradition of Jorion (2007) and the Basel market-risk framework.	Conditional Value-at-Risk (CVaR), also called Expected Shortfall, is a coherent tail-risk measure that quantifies the conditional expectation of losses beyond the Value-at-Risk threshold. It was introduced for optimization by Rockafellar and Uryasev (2000) and shown to be coherent by Acerbi and Tasche (2002), and it has replaced VaR as the regulatory standard under Basel III/IV.