Difference between revisions of "Manipulating Financial Data in Python"

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==Module 1: Reading, slicing and plotting stock data==
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==Lesson 1: Reading, slicing and plotting stock data==
*Overview of the data we'll be working with.
+
*Overview of the data we'll be working with (from Yahoo!)
 
*Introduction to our primary library: Pandas
 
*Introduction to our primary library: Pandas
 
*Reading CSV data into Pandas
 
*Reading CSV data into Pandas
 
*Filtering to specific dates
 
*Filtering to specific dates
*Sorting
 
 
*Plotting
 
*Plotting
  
<B>script</B>
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Reading: "Python for Finance", Chapter 6: Financial time series
* Overview of data we'll be working with: AAPL.csv, SPY.csv (note date order)
 
** Meaning of various columns
 
* The Pandas dataframe
 
* Read CSV into a dataframe (AAPL example)
 
* Slice according to dates
 
* [quiz: read SPY.csv and slice against different dates]
 
* Plot (note date order wrong)
 
* Sort
 
* Plot
 
  
==Module 2: Building a dataframe with lots of stocks==
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==Lesson 2: Working with many stocks at once==
* What we want to end up with: Rows: Dates, Columns: Symbols
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*Our target data frame structure
* Step by step how to build it
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*Address reverse order issue
* SPY.csv will be our reference -- it trades every day the market is open.
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*Reading data for multiple stocks into the structure
* Read SPY.csv, slice to date range, sort
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*Date slicing
* Read AAPL.csv, merge() into existing dataframe
+
*Symbol slicing
* Repeat with GLD, IBM, GOOG
+
*Plotting
* Plot and display legend
+
*Normalizing
* Observe: Scale not good, let's normalize
+
 
* Print some of the numbers
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==Lesson 3: The power of Numpy==
* Plot after normalization
+
*What is Numpy and how it relates to Pandas
* [quiz: normalize at a different date]
+
*Why is Numpy powerful/important?
 +
*Creating Numpy arrays
 +
*Indexing and slicing Numpy arrays
 +
*Important data processing on Numpy arrays
 +
*Example use with pandas too
 +
 
 +
Reading: "Python for Finance", Chapter 4: Data types and structures
  
==Module 3: Numpy fundamentals==
+
==Lesson 4: Statistical analysis of time series==
*Numpy relationship to Pandas
+
*Gross statistics on dataframes
*Creating Arrays
+
*Rolling statistics on dataframes
**empty, zeros, ones
+
*Plotting a technical indicator (Bollinger Bands)
*Basic Indexing and Slicing (start at 0 not 1)
 
*[quiz: print 2nd & 3rd columns]
 
*Index one array by another
 
*Reshaping
 
*Data Processing using Arrays
 
**Sum rows, Sum columns
 
**Statistics on columns: Mean, Median, stddev
 
*See: http://wiki.quantsoftware.org/index.php?title=Numpy_Tutorial_1
 
  
==Module 4: Statistical analysis of time series==
+
Reading: "Python for Finance", Chapter 6: Financial time series
*Rolling statistics example
 
**Read SPY
 
**20 day rolling average
 
**+- 20 day rolling stdev * 2
 
**Plot above as Bollinger bands
 
*Discussion of daily returns, what they are, how to calculate
 
*[quiz: compute and plot SPY and XOM daily returns]
 
*Scatter plot (plot SPY vs XOM)
 
*Compare SPY vs GLD.  How can we quantify these differences?
 
*Fit a line and plot it, print slope and corrcoef for SPY & XOM
 
*Discussion of correlation not the same as slope
 
  
==Module 5: Incomplete data==
+
==Lesson 5: Incomplete data==
*[for this lesson: need to create 4 assets: SPY no missing, X ends midway, Y begins midway, Z has periodic outages]
+
*How incomplete data arises in financial data
*Read SPY
+
*Different approaches to dealing with it
**20 day rolling average
 
**Plot
 
*Attempt above with X, what happens? (incomplete data)
 
*Look at data; NaN!
 
*What to do?
 
*Discussion & drawing of the types of incomplete data characterized by 4 examples above.
 
*What is the proper way to handle?
 
*[quiz: implement and plot fill forward on X]
 
*Show Pandas methods for forward fill and backward fill, plot rolling averages
 
  
==Module 6: Computing statistics on a portfolio==
+
==Lesson 6: Histograms and scatter plots==
*Statistics we'll look at:
 
**Average daily return
 
**Stddev of daily return: volatility
 
**Total return
 
**Sharpe ratio
 
*Buy and hold: SPY, GLD, GOOG, XOM, $100K each
 
*Show how to read assets, normalize so each starts at $100K, goes forward.
 
*[quiz: compute total daily portfolio value and daily rets for portfolio]
 
*Show how to compute, avg daily rets, stdev, total ret, Sharpe ratio
 
  
==Module 7: Optimizers: Building a parameterized model==
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* Histogram of daily returns
 +
* Compare SPY with XOM
 +
* Scatter plots
 +
* Correlation is not slope!
 +
* Compare SPY vs XOM, with SPY vs GLD scatter plots
 +
 
 +
Reading: "Python for Finance", Chapter 5: Data Visualization
 +
 
 +
==Lesson 7: Sharpe ratio & other portfolio statistics==
 +
*Speed up reading data by memoizing
 +
*Average daily return
 +
*Volatility: stddev of daily return (don't count first day)
 +
*Cumulative return
 +
*Relationship between cumulative and daily
 +
*Sharpe Ratio
 +
*How to model a buy and hold portfolio
 +
 
 +
==Lesson 8: Optimizers: Building a parameterized model==
 
*What does an optimizer do?
 
*What does an optimizer do?
*Show syntax of optimizer use
+
*Syntax of optimizer use
*Create fake data
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*Problem statement for an optimizer (inputs, outputs, assumptions)
*Try to fit it using an optimizer
+
*How to find X that minimizes f(X) with a minimizer
*[quiz: add another type of curve to fit (e.g., sine)]
+
*How to build a parameterized polynomial model from real data using an optimizer
 +
 
 +
==Lesson 9: Optimizers: How to optimize a portfolio==
 +
*What does it mean to "optimize" a portfolio
 +
*Framing the problem for an optimizer
 +
*Constraints on X for an optimizer
 +
*Ranges on X for an optimizer
  
==Module 8: Optimizers: How to optimize a portfolio==
+
Reading: "Python for Finance", Chapter 11: Statistics-Portfolio Optimization
*Frame the portfolio optimization problem for the optimizer
 
*Add target return
 
*Plug the parts together in code for 4 assets
 
*[quiz: Add constraints on holdings]
 

Latest revision as of 18:10, 24 August 2016

Lesson 1: Reading, slicing and plotting stock data

  • Overview of the data we'll be working with (from Yahoo!)
  • Introduction to our primary library: Pandas
  • Reading CSV data into Pandas
  • Filtering to specific dates
  • Plotting

Reading: "Python for Finance", Chapter 6: Financial time series

Lesson 2: Working with many stocks at once

  • Our target data frame structure
  • Address reverse order issue
  • Reading data for multiple stocks into the structure
  • Date slicing
  • Symbol slicing
  • Plotting
  • Normalizing

Lesson 3: The power of Numpy

  • What is Numpy and how it relates to Pandas
  • Why is Numpy powerful/important?
  • Creating Numpy arrays
  • Indexing and slicing Numpy arrays
  • Important data processing on Numpy arrays
  • Example use with pandas too

Reading: "Python for Finance", Chapter 4: Data types and structures

Lesson 4: Statistical analysis of time series

  • Gross statistics on dataframes
  • Rolling statistics on dataframes
  • Plotting a technical indicator (Bollinger Bands)

Reading: "Python for Finance", Chapter 6: Financial time series

Lesson 5: Incomplete data

  • How incomplete data arises in financial data
  • Different approaches to dealing with it

Lesson 6: Histograms and scatter plots

  • Histogram of daily returns
  • Compare SPY with XOM
  • Scatter plots
  • Correlation is not slope!
  • Compare SPY vs XOM, with SPY vs GLD scatter plots

Reading: "Python for Finance", Chapter 5: Data Visualization

Lesson 7: Sharpe ratio & other portfolio statistics

  • Speed up reading data by memoizing
  • Average daily return
  • Volatility: stddev of daily return (don't count first day)
  • Cumulative return
  • Relationship between cumulative and daily
  • Sharpe Ratio
  • How to model a buy and hold portfolio

Lesson 8: Optimizers: Building a parameterized model

  • What does an optimizer do?
  • Syntax of optimizer use
  • Problem statement for an optimizer (inputs, outputs, assumptions)
  • How to find X that minimizes f(X) with a minimizer
  • How to build a parameterized polynomial model from real data using an optimizer

Lesson 9: Optimizers: How to optimize a portfolio

  • What does it mean to "optimize" a portfolio
  • Framing the problem for an optimizer
  • Constraints on X for an optimizer
  • Ranges on X for an optimizer

Reading: "Python for Finance", Chapter 11: Statistics-Portfolio Optimization