Indian rupee on Friday weakened past 81 mark to a fresh record low against US dollar for the first time while 10-year bond yield jumped 6 basis points to hit over two-month high on the back of surge in US treasury yields. The home currency opened at 81.03 a dollar and touched an all-time low of 81.26. At 9.15 am, the domestic currency was trading at 81.15 a dollar, down 0.33% from its previous close of 80.87. This was the seventh out of eight sessions when the currency dropped and lost over 2.51% in this period. So far this year, it fell around 8.48%.