The Sensex declined 3.5 per cent in December - its worst last-month returns since 2011
The Sensex had ended 162.03 points, or 0.39 per cent, lower at 41,464.61 on Friday as well
The yield on the 10-year government security rose nearly 8 basis points to 6.71 per cent. Bond yields and prices move in opposite directions
Sensex ends down 354 pts as Oct IIP disappoints