Whois & Analysis for janestreet.com

Mathematical finance, also known as quantitative finance, is a field of applied mathematics, concerned with financial markets.

Generally, mathematical finance will derive and extend the mathematical or numerical models without necessarily establishing a link to financial theory, taking observed market prices as input.

Mathematical consistency is required, not compatibility with economic theory.

Thus, for example, while a financial economist might study the structural reasons why a company may have a certain share price, a financial mathematician may take the share price as a given, and attempt to use stochastic calculus to obtain the corresponding value of derivatives of the stock (see: Valuation of options; Financial modeling).

The fundamental theorem of arbitrage-free pricing is one of the key theorems in mathematical finance, while the Black–Scholes equation and formula are amongst the key results.

In business, economics or investment, market liquidity is a market's ability to purchase or sell an asset without causing drastic change in the asset's price.

Equivalently, an asset's market liquidity (or simply "an asset's liquidity") describes the asset's ability to sell quickly without having to reduce its price to a significant degree.

Liquidity is about how big the trade-off is between the speed of the sale and the price it can be sold for.

In a liquid market, the trade-off is mild: selling quickly will not reduce the price much.

In a relatively illiquid market, selling it quickly will require cutting its price by some amount.

Problem solving consists of using generic or ad hoc methods, in an orderly manner, for finding solutions to problems.

Some of the problem-solving techniques developed and used in artificial intelligence, computer science, engineering, mathematics, or medicine are related to mental problem-solving techniques studied in psychology.

A business (also known as an enterprise, a company or a firm) is an organizational entity involved in the provision of goods and services to consumers.

Businesses serve as a form of economic activity, and are prevalent in capitalist economies, where most of them are privately owned and provide goods and services allocated through a market to consumers and customers in exchange for other goods, services, money, or other forms of exchange that hold intrinsic economic value.

Businesses may also be social non-profit enterprises or state-owned public enterprises operated by governments with specific social and economic objectives.

A business owned by multiple private individuals may form as an incorporated company or jointly organise as a partnership.

Countries have different laws that may ascribe different rights to the various business entities.