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A measure of risk based on the standard deviation of the asset return. Volatility is a variable that appears in option pricing formulas, where it denotes the volatility of the underlying asset return from now to the expiration of the option. There are volatility indexes. Such as a scale of 1-9; a higher rating means higher risk.


A measure of a security's stability. It is calculated as the standard deviation from a certain continuously compounded return over a given period of time. It is an important measure in quantifying risk; for example, a security with a volatility of 50% is considered very high risk because it has the potential to increase or decrease up to half its value. Volatility may influence the type of investments one makes: one may directly invest in non-volatile securities, such as a certificate of deposit, but highly volatile securities lend themselves more to short selling and other forms of hedging.


The term volatility indicates how much and how quickly the value of an investment, market, or market sector changes.

For example, because the stock prices of small, newer companies tend to rise and fall more sharply over short periods of time than stock of established, blue-chip companies, small caps are described as more volatile.

The volatility of a stock relative to the overall market is known as its beta, and the volatility triggered by internal factors, regardless of the market, is known as a stock's alpha.

References in periodicals archive ?
The FM20L08 is organized as a 128K x 8 nonvolatile memory that reads and writes like a standard SRAM.
Data is nonvolatile so data won't be lost if the capacitor fails.
In addition to offering greater endurance, FRAM memory from Ramtron, which uses a thin film ferroelectric material to create its nonvolatile element, also offers faster write cycle times than competing products (200 nanoseconds, or billionths of a second, instead of 10 milliseconds, or millionths of a second, for EEPROM), completely random access, and single 5 volt operation within the device.
SST's SuperFlash technology is a NOR type, split-gate cell architecture which uses a reliable thick-oxide process with fewer manufacturing steps resulting in a low-cost, nonvolatile memory solution with excellent data retention and higher reliability.
Cree's nonvolatile memory contract win is a prime example of defense conversion, since it utilizes Defense Department funds to develop dual-use technology.
Ramtron International Corporation develops, manufactures and markets FRAM products based on ferroelectric materials with unique nonvolatile and high-dielectric constant storage characteristics.
Simtek Corporation designs and markets high-speed, re-programmable, nonvolatile semiconductor memory products, for use in a variety of systems including RAID servers, storage arrays, GPS navigational systems, industrial controllers, robotics, copiers, avionics, medical devices, metering, consumer, UPS, and networking and broadcast equipment.
Non-volatile phase-change memory boasts rapid write and erase speeds, elevated cycling endurance, and superior scaling performance as the industry moves toward newer generations of nonvolatile solid state memory.
Simtek Corporation (OTC Bulletin Board: SRAM), the inventor, pioneer, and world's leading supplier of nonvolatile static random access memory (nvSRAM) integrated circuits today announced that it has received production orders from Sun Microsystems, Inc.
Ramtron International Corporation (Nasdaq:RMTR), a leading developer and supplier of nonvolatile ferroelectric random access memory (FRAM) and integrated semiconductor products, today launched the VRS51L3074, the market's first 8051-based microcontroller with nonvolatile FRAM memory.