Value at Risk
VaR is a toy that quantifies future uncertainty by claiming to estimate the maximum loss over a period. In budgeting meetings it appears as a magical incantation that seals away riskâlow numbers bring comfort, high numbers herald danger. In reality, it merely assembles assumptions and historical data into a calculation that pleases no one, stirring both hope and anxiety. As the honor student of blame-shifting, VaR sits in the corner of financial statements chuckling quietly. Investors and executives alike tend to avert their gaze from the truths lurking behind its probability distributions.