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Statistical physics approaches to fi...

Wang, Fengzhong.

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Statistical physics approaches to financial fluctuations.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Statistical physics approaches to financial fluctuations./
Author:	Wang, Fengzhong.
Description:	117 p.
Notes:	Source: Dissertation Abstracts International, Volume: 70-07, Section: B, page: 4271.
Contained By:	Dissertation Abstracts International70-07B.
Subject:	Economics, Finance. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3363650
ISBN:	9781109234589

Statistical physics approaches to financial fluctuations.
Wang, Fengzhong.

Statistical physics approaches to financial fluctuations. - 117 p.

Source: Dissertation Abstracts International, Volume: 70-07, Section: B, page: 4271.

Thesis (Ph.D.)--Boston University, 2009.

Complex systems attract many researchers from various scientific fields. Financial markets are one of these widely studied complex systems. Statistical physics, which was originally developed to study large systems, provides novel ideas and powerful methods to analyze financial markets. The study of financial fluctuations characterizes market behavior, and helps to better understand the underlying market mechanism.

ISBN: 9781109234589Subjects--Topical Terms:

626650
Economics, Finance.

Statistical physics approaches to financial fluctuations.
LDR:03138nam 2200313 4500 001 1394963
005 20110506125532.5
008 130515s2009 ||||||||||||||||| ||eng d
020 $a 9781109234589
035 $a (UMI)AAI3363650
035 $a AAI3363650
040 $a UMI $c UMI
100 1 $a Wang, Fengzhong. $3 1673621
245 1 0 $a Statistical physics approaches to financial fluctuations.
300 $a 117 p.
500 $a Source: Dissertation Abstracts International, Volume: 70-07, Section: B, page: 4271.
500 $a Adviser: H. Eugene Stanley.
502 $a Thesis (Ph.D.)--Boston University, 2009.
520 $a Complex systems attract many researchers from various scientific fields. Financial markets are one of these widely studied complex systems. Statistical physics, which was originally developed to study large systems, provides novel ideas and powerful methods to analyze financial markets. The study of financial fluctuations characterizes market behavior, and helps to better understand the underlying market mechanism.
520 $a Our study focuses on volatility, a fundamental quantity to characterize financial fluctuations. We examine equity data of the entire U.S. stock market during 2001 and 2002. To analyze the volatility time series, we develop a new approach, called return interval analysis, which examines the time intervals between two successive volatilities exceeding a given value threshold. We find that the return interval distribution displays scaling over a wide range of thresholds. This scaling is valid for a range of time windows, from one minute up to one day. Moreover, our results are similar for commodities, interest rates, currencies, and for stocks of different countries. Further analysis shows some systematic deviations from a scaling law, which we can attribute to nonlinear correlations in the volatility time series. We also find a memory effect in return intervals for different time scales, which is related to the long-term correlations in the volatility.
520 $a To further characterize the mechanism of price movement, we simulate the volatility time series using two different models, fractionally integrated generalized autoregressive conditional heteroscedasticity (FIGARCH) and fractional Brownian motion (fBm), and test these models with the return interval analysis. We find that both models can mimic time memory but only fBm shows scaling in the return interval distribution.
520 $a In addition, we examine the volatility of daily opening to closing and of closing to opening. We find that each volatility distribution has a power law tail. Using the detrended fluctuation analysis (DFA) method, we show long-term auto-correlations in these volatility time series. We also analyze return, the actual price changes of stocks, and find that the returns over the two sessions are often anti-correlated.
590 $a School code: 0017.
650 4 $a Economics, Finance. $3 626650
650 4 $a Physics, Theory. $3 1019422
690 $a 0508
690 $a 0753
710 2 $a Boston University. $3 1017454
773 0 $t Dissertation Abstracts International $g 70-07B.
790 1 0 $a Stanley, H. Eugene, $e advisor
790 $a 0017
791 $a Ph.D.
792 $a 2009
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3363650