Historical Volatility

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Benzinga  1 hr ago  Comment 
Bellicum Pharmaceuticals Inc (NASDAQ: BLCM) was at its volatile best all this week. After a 14-percent gain Monday, the stock pulled back slightly Tuesday and retreated by less than 2 percent Wednesday. It rallied over 10 percent Thursday, only...
Forbes  2 hrs ago  Comment 
Snap has had a relatively rocky few months since its March IPO, with its Q1’17 user growth coming in below expectations and its stock witnessing significant volatility amid Facebook’s moves to quickly copy its best features. That said, Snap...
The Hindu Business Line  4 hrs ago  Comment 
Edible oils after extending loss, ruled steady at the end of the day on Friday tracking range bound thin volatility in futures amid cautious mood ahead of GST to be implemented from 1st July. Du...
The Hindu Business Line  Jun 23  Comment 
The Saudi organised boycott of Qatar spells a further unsettling of the geopolitics of a volatile region
MarketWatch  Jun 22  Comment 
This might be a “less volatile way” to bet on cryptocurrencies over just buying bitcoin or ethereum -- though there’s still plenty of risk.
Motley Fool  Jun 22  Comment 
These are the top-performing tech stocks so far in 2017. Many of these short-term gains could stretch far into the future, too.
Benzinga  Jun 22  Comment 
Hain Celestial Group Inc (NASDAQ: HAIN) shares are trading lower by 75 cents at $32.41 in Thursday's session. Before the open, the company delivered a mixed bag of news, which is being reflected in today's price action. It began with a Q3 EPS...




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Volatility refers to the tendency of prices to change unexpectedly, usually as a response to new information or changes in demand for the investment. Volatility can be defined as an investment's tendency to move up and down in price over the latest n periods.

A security with high volatility has bigger fluctuations in price compared to a security with low volatility. The more quickly a price changes up and down, the more volatile it is. As such, volatility is often used as a measure of risk.

For example: A stock whose price went up 10% yesterday and went down 25% today is more volatile than a stock which increased 2% in both days.

Historical volatility is calculated by looking at past changes in stock price. The standard deviation of percentage changes in price is used to calculate observed volatility within the considered timeframe.

Historical Volatility, which looks at the past, is distinct from Implied volatility, which represents expectations about future fluctuations in price and is calculated by looking at the prices of options on the underlying investment.

Volatility is also different from Beta, which is a measure of how the stock price reacts to changes in a broad market index, such as the S&P 500.


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