An interactive data visualization of White Noise's plot and themes. The family lived in close quarters and spoke a mixture of Italian and English, often combining the two. Nonetheless, he slowly became a voracious reader, a habit that consumed him throughout his 20s and into his 30s. Unable to find a job in publishing, he worked as a copywriter at an advertising agency in Midtown, a position he eventually left because he no longer found it interesting.
In this article we will make full use of serial correlation by discussing our first time series models, including some elementary linear stochastic models. In particular we are going to discuss White Noise and Random Walks.
Recapping Our Goal Before we dive into definitions I want to recap our reasons for studying these models as well as our end goal in learning time series analysis. Fundamentally we are interested in improving the profitability of our trading algorithms. As quants, we do not rely on "guesswork" or "hunches".
Our approach is to quantify as much as possible, both to remove any emotional involvement from the trading process and to ensure to the extent possible repeatability of our trading. In order to improve the profitability of our trading models, we must make use of statistical techniques to identify consistent behaviour in assets which can be exploited to turn a profit.
To find this behaviour we must explore how the properties of the asset prices themselves change in time. Time Series Analysis helps us to achieve this. It provides us with a robust statistical framework for assessing the behaviour of time series, such as asset prices, in order to help us trade off of this behaviour.
Time Series Analysis provides us with a robust statistical framework for assessing the behaviour of asset prices. So far we have discussed serial correlation and examined the basic correlation structure of simulated data.
In addition we have defined stationarity and considered the second order properties of time series. All of these attributes will aid us in identifying patterns among time series. If you haven't read the previous article on serial correlationI strongly suggest you do so before continuing with this article.
In the following we are going to examine how we can exploit some of the structure in asset prices that we've identified using time series models. Time Series Modeling Process So what is a time series model?
Essentially, it is a mathematical model that attempts to "explain" the serial correlation present in a time series. When we say "explain" what we really mean is once we have "fitted" a model to a time series it should account for some or all of the serial correlation present in the correlogram.
That is, by fitting the model to a historical time series, we are reducing the serial correlation and thus "explaining it away". Our process, as quantitative researchers, is to consider a wide variety of models including their assumptions and their complexity, and then choose a model such that it is the "simplest" that will explain the serial correlation.
Once we have such a model we can use it to predict future values or future behaviour in general. This prediction is obviously extremely useful in quantitative trading.
If we can predict the direction of an asset movement then we have the basis of a trading strategy allowing for transaction costs, of course! Also, if we can predict volatility of an asset then we have the basis of another trading strategy or a risk-management approach.
This is why we are interested in second order properties, since they give us the means to help us make forecasts.
One question that arises here is "How do we know when we have a good fit for a model?
What criteria do we use to judge which model is best? In fact, there are several! We will be considering these criteria in this article series. Let's summarise the general process we will be following throughout the series: Outline a hypotheis about a particular time series and its behaviour Obtain the correlogram of the time series perhaps using R or Python libraries and assess its serial correlation Use our knowledge of time series models and fit an appropriate model to reduce the serial correlation in the residuals see below for a definition of the model and its time series Refine the fit until no correlation is present and use mathematical criteria to assess the model fit Use the model and its second-order properties to make forecasts about future values Assess the accuracy of these forecasts using statistical techniques such as confusion matricesROC curves for classification or regressive metrics such as MSEMAPE etc Iterate through this process until the accuracy is optimal and then utilise such forecasts to create trading strategies That is our basic process.LitCharts assigns a color and icon to each theme in White Noise, which you can use to track the themes throughout the work.
Fear, Death, and Control Uncertainty and Authority. In fact, White Noise takes many cues from the non-literary commodities of consumer culture and marketing, like, for example, Coca-Cola’s slogan “Coke is it,” which appears directly in the text.
White Noise Essay Examples. An Analysis of the Complexity of White Noise. 1, words. 3 pages. A Literary Analysis of White Noise by Don Delillo. 1, words.
4 pages. A Literary Analysis of White Noise by Don Delillo. 1, words. 4 pages.
The Portrayal of Death in Don Delillo's "White Noise". Apr 12, · initiativeblog.com Click Here for the FREE Sound Design Course. Analysis of the time series of the velocity of the COP displacement also revealed a significant increase in the values of the complexity during the application of subsensory noise for both the AP (p value=) and ML (p value=) directions.
White Noise is a book that tends to be taught more in universities than in high schools. One of the reasons is because the book pokes a lot of fun at university professors and faculties.