finance

FINANCE

This module contains an implementation of Markowitz algorithm for the portfolio optimization, a routine for retrieving historical prices from Yahoo, statistical information for stocks and a routine for calculating implied volatility using Black and Scholes formula.

Example

See examples directory.

For a frontend, see node-conpa.

Installation

To install with npm:

npm install finance

Tested with Node.js 10.x, R 3.4.3 and Rserve 1.7.3.

Notes

Before using crm methods, you need to configure the details of the persistence system. The portfolios are saved on a CouchDB instance. The configuration allows a live and testing environment.

finance.crm.configure({
    liveDomain: "x.x.x",
    liveUrl: "http://key1:[e-mail]",
    liveDb: "myLiveDBName",
    testingUrl: "http://key2:[e-mail]",
    testingDb: "myTestingDBName",
    design: "designName",
});

In the support directory there is a script to install the design document with the views used in the dashboard tab.

Methods

keystatistics.getKeyStatistics(params, callback)

It retrieves the key statistics for the stocks and returns an array of objects to create an uneditable form on front-end side.

Params

• symbol asset symbol.

Callback response

• keyStatistics object.

optionchain.getOptionChainFromYahoo(params, callback)

It retrieves the strike values for calls and puts from Yahoo! Finance.

Params

• symbol asset symbol.
• expiration expiration month. Has to be in the form: "YYYY-MM-DD", example: "2016-01-03".

Callback response

• optionChain

  • strike strike value of the asset.
  • expDateStr expire date (string).
  • expDate expire date (Date).
  • now Date.
  • calls vector of call values.
  • puts vector of put values.

parsecsv.parse(arr, options)

Arguments

• arr is the string containing the comma separated value content.

• options

  • skipHeader flag to skip the first row (dafault false).
  • delimeter is the delimeter between the fields (default ",").
  • reverse to reverse the rows (default false).
  • column is the column to extract (default 0).
  • replaceZeroes flag to replace zeroes with the previous value (default false).
  • skipNRecords flag to skip records (default 0).

performances.getPerformances(x, weights)

It calculates the weighted performance for a matrix.

Arguments

• x matrix containing the values (i.e. the asset returns).
• weights the weights

Returns a vector containing the weighted perfomance of the matrix.

portfolio.getOptimalPortfolio(params, callback, config)

It creates an optimal portfolio. If config is defined, the method call a Rserve instance, otherwise a native implementation is used.

Params

• prods vector of symbols.
• referenceDate reference date (String).
• targetReturn weekly target return, if undefined, the mean of returns.
• lows vector of constraints.
• highs vector of constraints.
• shorts a logical indicating whether shortsales are allowed.

Callback response

• perf performances vector.

• message error message, if empty the optimization is fine.

• optim details of quadprog response.

  • solution vector of weights.
  • value the value of the quadratic function at the solution.
  • unconstrained_solution vector of the unconstrained minimizer.
  • iterations the number of iterations the algorithm needed.
  • iact vector with the indices of the active constraints at the solution.
  • message error message, if empty the optimization is fine.
  • pm portfolio return.
  • ps portfolio risk.

Config

• host hostname or ip address of R instance.
• port port of Rserve instance.
• user username for remote connection of Rserve instance.
• password password for remote connection of Rserve instance.
• debug boolean to enable rio logging.

portfolio.getScriptOptimalPortfolio(params, callback)

It retrieves the source code of the R script calculating the optimal portfolio.

Params See portfolio.getOptimalPortfolio.

Callback response

• source the source code of the script.

quotes.getQuotes(symbol, refDate, callback)

It retrieves the prices from Yahoo! finance.

Arguments

• symbol asset symbol.
• refDate reference date (Date).

Callback response

• error calback error.

• symbol asset symbol.

• prices

  • beforeRefDate CSV string of prices before reference date.
  • afterRefDate CSV string of prices after reference date.

returns.getReturns(symbols, refDate, callback)

It retrieves the prices from Yahoo! finance and calculates the log returns of the close prices.

Arguments

• symbols vector containing the symbols of the assets.
• refDate reference date (String).

Callback response

• returns

  • message message error.
  • beforeRefDate vector of log returns of close prices before reference date.
  • afterRefDate vector of log returns of close prices after reference date.

riskfreerate.getRiskFreeRateFromYahoo(callback)

It retrieves the risk free rate from Yahoo! Finance.

Callback response

• riskfree risk free rate.

volatility.getImpliedVolatility(params, callback)

It calculates the implied volatility for an option using Black and Scholes formula.

Arguments

• symbol asset symbol.

Callback response

• option

  • strike strike of the asset.
  • riskfree risk free rate.
  • expDate expire date (string).
  • callVolatility implied volatility for the calls.
  • putVolatility implied volatility for the puts.

crm.configure(params)

It configures a CRM database instance (i.e. a CouchDB instance). The user can configure a testing and live instance.

Params

• liveDomain url for the live domain.
• liveUrl url for the live instance, eventually with the credentials.
• liveDb name of live instance.
• testingUrl url for the testing instance, eventually with the credentials.
• testingDb name of testing instance.
• design name of design document.

crm.putPortfolioOnCRM(params, callback)

It saves a portfolio and his stats to CRM database.

Params

• symbols portfolio assets.
• weights weights of the portfolio assets.
• ref reference date (string).
• ret target return of the portfolio.
• risk risk of the portofolio.
• perf performances vector.
• highs high constraints.
• lows low constraints.

Response callback

• id id of the portfolio saved.

crm.getPortfolio(params, callback)

It retrieves a portfolio.

Params

• id portfolio id.

Response callback

• assets portfolio assets.

• constraints portfolio constraints.

  • highs high constraints.
  • lows low constraints.

• created_at creation date of the portfolio.

• perf performances vector.

• ref reference date (string).

• ret target return of the portfolio.

• risk risk of the portofolio.

• weights weights of the portfolio assets.

crm.getPortfolioCount(callback)

It retrieves the number of portfolios saved.

Response callback

• rows array of results.

  • key null.
  • value the number of portfolios.

crm.getMostUsedAssets(callback)

Response callback

• MostUsedAssets

  • key asset symbol.

  • value

    • stock asset frequency.

crm.getLastCreatedPortfolios(limit, callback)

It retrieves the latest portofolios created.

Arguments

• limit maximum number of records.

Response callback

• rows array of results.

  • key Date (string).

  • value Portfolio.

    • created_at creation date (string).

    • assets vector containing the assets.

    • weights the weight of the assets.

    • ref reference date.

    • ret target return.

    • risk portfolio risk.

    • perf portfolio performance at reference date.

    • constraints

      • lowBounds vector containing low constraints.
      • highBounds vector containing high constraints.

crm.getHighProfileRiskPortfolios(limit, callback)

It retrieves the portfolios with high profile risk.

For arguments and response callback see getLastCreatedPortofolios method.

crm.getLowProfileRiskPortfolios(limit, callback)

It retrieves the portfolios with low profile risk.

For arguments and response callback see getLastCreatedPortofolios method.

crm.getHighProfileReturnPortfolios(limit, callback)

It retrieves the portfolios with high profile return.

For arguments and response callback see getLastCreatedPortofolios method.

crm.getLowProfileReturnPortfolios(limit, callback)

It retrieves the portfolios with low profile return.

For arguments and response callback see getLastCreatedPortofolios method.

crm.getBestPerformingPortfolios(limit, callback)

It retrieves the portfolios with the best performance.

For arguments and response callback see getLastCreatedPortofolios method.

crm.getWorstPerformingPortfolios(limit, callback)

It retrieves the portfolios with the worst performance.

For arguments and response callback see getLastCreatedPortofolios method.