<div>The rupee weakened in opening trade on Friday tracking weakness in offshore non-deliverable forwards but better-than-expected factory output data may limit a very sharp fall.</div><div> </div><div>The partially convertible rupee was trading at 64.00/01 per dollar by 09:05 a.m. versus its previous close of 63.50/51 on Thursday, 12 September. The benchmark 10-year bond yield was trading up 2 basis points at 8.52 per cent.</div><div> </div><div>The one-month offshore non-deliverable forward rate trading at 64.72 versus its previous close of 64.30.</div><div> </div><div>Traders say wholesale price inflation data, due on Monday, will be the next key trigger for markets.</div><div> </div><div>(Reuters) </div><div> </div>