5Stocks.java

public class StockData{
 public static void main(String[] args){

 FileIO io = new FileIO();
 String[] original = io.load("C:\\ stockdata.txt");
 int numrows=original.length;
 int numcols=original[0].split("\t").length;
 double[][] array = new double[numrows][numcols];

 for(int i=1;i<numrows;i++){ //load in the data
 for(int j=1;j<numcols;j++){
 array[i][j]=Double.parseDouble(original[i].split("\t")[j]);
 }
 }
 double drawdown=0; 
 String startdate="";
 String finishdate="";
 String company="";
 for(int j=1;j<numcols;j++){ //repeat for all companies
 double current=100; //start current price at 100%
 double peak=100; //start peak is 100%
 double trough=0;
 String localstartdate="";
 String localfinishdate="";
 String recorddate="";
 for(int i=numrows-1;i>0;i--){ 
//go through each day - data is backwards
 current=current+(current*(array[i][j]/100));
//change the price for today
 if(current>peak){ //if it's a record high update
 peak=current;
recorddate=original[i].split("\t")[0];
//keep track of the date
 }else if(1-current/peak>trough){
//otherwise, are we lower than ever before below the current peak?
 trough=1-current/peak;
//keep track of this super low
 localstartdate=recorddate;
 localfinishdate=original[i].split("\t")[0];
 }
 }
 if(trough>drawdown){

 drawdown=trough;
 startdate=localstartdate;
 finishdate=localfinishdate;
 company=original[0].split("\t")[j]; //remember the company
 }
 } //print out the overall results
System.out.println("The company with the highest drawdown was"+company+" which suffered a drawdown of"+String.format("%.1f",drawdown*100)+"% between the dates of "+startdate+"and "+finishdate);
 }
}