The letter Τ/τ in the Greek, Hebrew and ancient Semitic alphabets, being the nineteenth letter of the Classical and Modern Greek, the twenty-first letter of Old and Ancient Greek
Tau protein, a type of protein that stabilizes microtubules in the human central nervous system, failures of which are associated with forms of dementia
A measurement of the sensitivity of the value of an option to changes in the implied volatility of the price of the underlyingasset