How do I bind a BindingList on worker thread to BindingSource on GUI thread C# WinForm

public class Stock : INotifyPropertyChanged
  {
      private string symbol;
      private double price;
      private int    size;

      public event PropertyChangedEventHandler PropertyChanged;

      public Stock(string symbol, double price, int size)
      {
          this.symbol = symbol;
          this.price = price;
          this.size = size;
      }

      public string Symbol
      {
          get { return symbol; }
      }

      public double Price
      {
          get { return price; }
          set
          {
              if (price != value)
              {
                  price = value;
                  OnPropertyChanged("Price");
              }
          }
      }

      public int Size
      {
          get { return size; }
          set
          {
              if (size != value)
              {
                  size = value;
                  OnPropertyChanged("Size");
              }
          }
      }

      private void OnPropertyChanged(string propertyName)
      {
          if(PropertyChanged != null)
              PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
      }
  }

public class StocksManager
 {
     // Members
     int NUM_PROCESSORS = Environment.ProcessorCount;

     MktDataSim                mktData;
     List<Thread>              workers;
     EventWaitHandle           signal;
     Queue<Stock>              workQueue;
     object                    sync;
     BindingList<Stock>        stocksCollec;

     // Constructor
     public StocksManager()
     {
         mktData          = new MktDataSim();
         workers          = new List<Thread>();
         signal           = new AutoResetEvent(false);
         workQueue        = new Queue<Stock>();
         sync             = new object();
         stocksCollec     = new BindingList<Stock>();

         mktData.StockUpdateHandler += new StockUpdateEventHandler
             (mktData_StockUpdateHandler);

         for (int i = 0; i < NUM_PROCESSORS; i++)
         {
             workers.Add(new Thread(worker));
             workers[i].IsBackground = true;
             workers[i].Start();
         }
     }

     // Properties
     public BindingList<Stock> StockCollection
     {
         get { return stocksCollec; }
     }

     // Methods/Event Handlers
     private void mktData_StockUpdateHandler(string symbol, double price, int size)
     {
         getMktData(new Stock(symbol, price, size));
     }


     private void getMktData(Stock stock)
     {
         lock (sync)
             workQueue.Enqueue(stock);
         signal.Set();
     }

     private void worker()
     {
         while (true)
         {
             Stock stock = null;

             lock (sync)
             {
                 if (workQueue.Count > 0)
                     stock = workQueue.Dequeue();
             }

             if (stock != null)
             {
                 string sym = stock.Symbol;
                 double prc = stock.Price;
                 int    sz  = stock.Size;

                 // I'm TRYING to only add new stocks
                 // but this isn't working because I
                 // can't distinguish by symbol
                 if (!stocksCollec.Contains(stock))
                 {
                     stocksCollec.Add(new Stock(sym,prc,sz));
                 }
                 else
                 {
                     int elmnt = stocksCollec.IndexOf(stock);
                     stocksCollec[elmnt].Price = prc;
                     stocksCollec[elmnt].Size  = sz;
                 }
             }
             else
             {
                 signal.WaitOne();
             }
         }
     }
}

public partial class Form1 : Form
  {
      StocksManager stkMngr;
      BindingSource stocksDataSource;

      public Form1()
      {
          InitializeComponent();

          stkMngr          = new StocksManager();

          // I'm using a bindingSource because
          // I'll need to be able to manipulate
          // my list of objects i.e. (sorting, removing,
          // updating, and deleting)
          stocksDataSource = new BindingSource();
          stocksDataSource.DataSource = stkMngr.StockCollection;
          dgvDisplay.DataSource = stocksDataSource;
      }