noch einarbeiten und testen:
http://tfc-charts.w2d.com/chart/TR
http://tfc-charts.w2d.com/intraday/ZB/90
http://www.ustreas.gov/offices/domestic-finance/debt-management/interest-rate/yield.shtml
http://money.cnn.com/data/bonds/
http://futures.tradingcharts.com/intraday/ZB
http://futures.tradingcharts.com/charts/hist/ZB/linew/ZB62012.png
http://futures.tradingcharts.com/intraday/ZBU1?anticache=1311581258