Another slump in Greek stocks holds back European shares
* FTSEurofirst 300 up 0.1 pct
* Greek stocks down 15 percent since start of week
* ARM gains after Apple results
* Lanxess, Nordea rally after results (Adds detail, updates prices)
By Alistair Smout and Blaise Robinson
LONDON/PARIS, Jan 28 (Reuters) - Greek stocks continued to slump on Wednesday, on mounting concerns about the banking sector in the wake of anti-bailout party Syriza's victory in Sunday's election and after the new government cancelled privatisation plans.
Other European stocks made marginal gains overall, but there were some upbeat corporate earnings reports and tech companies got a boost from Apple's robust profit growth.
Athens' ATG share index was down 9.2 percent and the Greek banking index skidded 27 percent, hitting a record low, as investors feared the new government's anti-austerity stance would make negotiations with the euro zone on a new aid deal difficult and jeopardise liquidity, traders said.
The ATG has now lost 15.4 percent since the start of the week while the banking index has plummeted 98.7 percent since late 2009, before Europe's sovereign debt crisis started. Continuación...