Randgold Resources (RRS) jumps 8.6% to £50 after its third quarter production update showed a large drop in costs. Yet analysts aren't entirely bowled over as cash is rapidly being depleted. Historically seen as having a robust balance sheet, Randgold now only has $17 million cash remaining, albeit access to an undrawn $200 million revolving credit facility. It has spent $545 million on capital expenditure this year but only generated $255 million cashflow, notes Investec. The bank says the key to rebuilding the balance sheet is Randgold hitting production targets in 2014 for its new mine, Kibali.