Solution is developed in the Visual Studio 2015. In addition to using C# .Net, Following frameworks are used.

• NUnit 3
• Moq
• FluentAssertion

This solution contains three projects. README file is in the Solution Items folder.

• JPMorgan.SuperSimpleStocks.Domain
  Project contains domain logic classes to implement the requirenments.
• JPMorgan.SuperSimpleStocks.Domain.UnitTest
  Unit test project for the Domain project classes. To run these unit tests NUnit Test Adapter 3.6 is required which can be added to the visual studio.
• JPMorgan.SuperSimpleStocks.GBCExchangeApi
  This is a basic api for providing interface to run all the required methods. You can use web browser or any application like postman to call methods in this webapi. Postman can be downloaded or added as chrome extension.

• Repositories:
  This project folder contains classes for Repository pattern, which is used for storing stocks and trades in memory. If in future we need to record in a file or database we can extend IStockRespository and ITradeRespository interfaces.

• Stock:
  Project folder contains classes for Stocks. Stock is an Abstract class which implements IStock interface, it contains PERatio method. Classes StockCommon and StockPreferred are derived from this abstract class.
  These derived classes then implements DividendYield abstract method by overriding the base class abstract method with using respective dividend yield formula for preferred and common stock.

• Trade
  Project folder contains ITrade interface and its implementation Trade class which contains properties to describe trade. This class contains no method as use cases didn't identified any.
  Method VolumeWeightedStockPrice seems more suitable to put outside in a service class called Trading.

• StockExchange
  This class is more like a service class which have following public methods.

	AddStock
	GetDividendYield
	GetPERatio
	GetAllShareIndex

• Trading
  This class is also more like a service class which have following public methods.

AddTrade
GetVolumeWeightedStockPrice (By default price is based on trades in past 15 minutes.)

• Validation This class contains methods for validation, throws exceptions if valid parameters is not passed to the method in which these validation methods are being called.
• Enums This contains enum for TradeType.