tau

The letter Τ /τ in the Greek alphabet; being the nineteenth letter of the Classical and Modern Greek, and the twenty-first letter of the Old and Ancient Greek alphabets.

A Τ-shaped object or sign; a Saint Anthony's cross, sometimes regarded as a sacred symbol.

The ankh symbol (☥).

主要写作τ:用于表示星座中第十九颗星(通常按亮度)。

Chiefly written τ: used to designate the nineteenth star (usually according to brightness) in a constellation.

衡量期权价值对标的资产价格隐含波动率变化的敏感度的指标。

A measurement of the sensitivity of the value of an option to changes in the implied volatility of the price of the underlying asset.