The Wolfram Language has immediate built-in access to current and historical financial and economic data.

() — request data using free-form linguistics

FinancialData — current and historical stock, fund, index, currency, etc. data

"Price"  ▪  "CumulativeReturn"  ▪  "Volatility50Day"  ▪  "MarketCap"  ▪  "PERatio"  ▪  "EBITDA"  ▪  "DividendYield"  ▪  "SICCode"  ▪  ...

CountryData, AdministrativeDivisionData — socioeconomic data and time series for all countries

"GDP"  ▪  "ExportValue"  ▪  "FixedInvestment"  ▪  "ElectricityProduction"  ▪  "OilReserves"  ▪  ...

"CurrencyCode"  ▪  "CurrentUnit"  ▪  "ExchangeRate"  ▪  ...

CurrencyConvert — convert between currencies

InflationAdjust — compute historical inflation adjustments

DateListPlot — plot a time series

MovingAverage  ▪  ExponentialMovingAverage  ▪  LinearModelFit