//////////////////////////////////////////////////////////
//deals with loading stocks
public static StockInformation[] Loadstocks(string _folderName)
{
//gets all the filenames within the stock directory
string[] _fileNames = Directory.GetFiles(_folderName, "*.xml").Select(Path.GetFileNameWithoutExtension).ToArray();
StockInformation[] _stockInfo = new StockInformation[_fileNames.Length]; //creating an array to store info
//loops through all filenames and gets the stock info
for (int i = 0; i < _fileNames.Length; i++)
{
//creates xml reader object to get stock info
XmlTextReader _reader = new XmlTextReader(_fileNames[i] + ".xml");
string _working = "";
//only saves information when there is information present
while (_reader.Read())
{
switch (_reader.NodeType)
{
case XmlNodeType.Text: {
_working = _reader.Value;
break;
}
}
}
_stockInfo[i] = ConvertStringToStockInformation(_working);
}
return(_stockInfo);
}
private void UpdateStock(string _file)
{
StockInformation _stock = FileHandling.LoadStock(_file);
lbl_StockName.Text = _stock.name;
lbl_Price.Text = Convert.ToString(_stock.price);
lbl_Dividend.Text = Convert.ToString(_stock.dividend);
picb_Chart.Load(HtmlHandling.GetChartAddress(_stock.name));
MainForm.Instance.stock = _stock;
}
///calculates forward price bounds given price, dividend predictions, time until maturity and interest region
public static float[] GetForwardPrices(StockInformation _stock, float[] _dividends, int _timeUntilMaturity, InterestRegion _region)
{
float[] prices = new float[3];
float riskFreeRate = GetIntrestRate(_region, _timeUntilMaturity);
for (int i = 0; i < _dividends.Length; i++)
{
prices[i] = GetForwardPrice(_stock, _dividends[i], _timeUntilMaturity, riskFreeRate);
}
return(prices);
}
//////////////////////////////////////////////////////////
// deals with saving a new stock
///saves the newly found stock
public static void SaveStockInformation(StockInformation _stockInformation)
{
//creates a new xml writing object
using (XmlWriter _writer = XmlWriter.Create(_stockInformation.name + ".xml")) {
_writer.WriteStartDocument();
_writer.WriteStartElement("Contains_Stock_Information");
//writes stock info
_writer.WriteElementString("Stock_Info", string.Format("{0}|{1}|{2}|{3}", _stockInformation.name, _stockInformation.price, _stockInformation.dividend, ConvertArrayToString(_stockInformation.dates)));
_writer.WriteEndElement();
_writer.WriteEndDocument();
}
}
private void Init()
{
lbl_StockName.BackColor = Colours.calculator;
lbl_Price.BackColor = Colours.calculator;
lbl_Date.BackColor = Colours.calculator;
StockInformation _stock = MainForm.Instance.stock;
float[] _dividends = MainForm.Instance.dividendPrediction;
int _days = MainForm.Instance.days;
lbl_StockName.Text = _stock.name;
lbl_Price.Text = _stock.price.ToString();
lbl_Days.Text = _days.ToString() + " days";
lbl_Date.Text = DateTime.Now.ToShortDateString();
lbl_Dividends.Text = MainForm.Instance.divNumber.ToString() + " dividends";
float[] _prices = Calculation.GetForwardPrices(_stock, _dividends, _days, MainForm.Instance.interestRegion);
lbl_Bounds.Text = string.Format("Upper: {0}\r\n\r\nMedian: {1}\r\n\r\nLower: {2}", _prices[0], _prices[1], _prices[2]);
}
//calculates indivdual forward price
private static float GetForwardPrice(StockInformation _stock, float dividend, int days, float riskFreeRate)
{
//initial
double _forward = _stock.price * Math.Exp(riskFreeRate / 100 * days);
int[] _daysUntilPayments = new int[_stock.dates.Length]; //array to store days until dividend payment
//loops through all dividends and gets the days until the payment
for (int i = 0; i < _daysUntilPayments.Length; i++)
{
_daysUntilPayments[i] = DateHandling.DaysUntil(_stock.dates[i]);
}
//loops through checking if dividend will be paid within time, if so it takes payment off price
for (int i = 0; i < _daysUntilPayments.Length; i++)
{
if (_daysUntilPayments[i] < days)
{
_forward -= dividend * Math.Exp(riskFreeRate * (days - _daysUntilPayments[i]));
}
}
return((float)_forward);
}
