Greek banks extend slide to peg back European shares

* FTSEurofirst 300 down 0.2 pct

* Greek stocks down 14 percent since start of week

* Tech rallies after Apple (NasdaqGS: AAPL - news) results

* Nordea gains after raising dividend (Adds quote, detail)

By Alistair Smout and Blaise Robinson

LONDON/PARIS, Jan 28 (Reuters) - European shares dipped on Wednesday, with Greek stocks extending the sell-off sparked by anti-bailout party Syriza's victory in Sunday's election.

The Greek banking index was down over 20 percent on Wednesday, hitting a record low. It has plummeted 98.6 percent since late 2009, before Europe's sovereign debt crisis started.

Traders said local 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.

The combined value of the top four Greek listed banks, Alpha Bank, Piraeus Bank, National Bank (NYSE: NBHC - news) of Greece , Eurobank Ergasias fell to about 12 billion euros ($13.6 billion).

"Should their collateral be disqualified by the ECB, they will have no money, and a bank with no money is not a bank ... The price is just building in the expectation that things could go pretty badly," said Simon Maughan, head of research at OTAS Technologies.

"A lot of local and retail punters ... will be looking at the price action and wanting to get out, at any price."

Shares (Berlin: DI6.BE - news) in Greek utility PPC and Piraeus Port Authority fell by 14.5 percent and 10.4 percent respectively after the new government said it would stop the planned sale of a 67 percent stake in Piraeus Port Authority.

Energy Minister Panagiotis Lafazanis told Greek television earlier that PPC's planned privatisation would also be halted.

Athens's ATG index was down 7.9 percent, having lost 14.1 percent since the start of the week.

At 1230 GMT, the FTSEurofirst 300 index of top European shares was down 0.2 percent at 1,472.58 points.

Shares in European technology firms rallied, with ARM Holdings up 1.6 percent, lifted by forecast-beating results from Apple. The group posted quarterly results that smashed Wall Street expectations with record sales of big-screen iPhones in the holiday shopping season and a 70 percent rise in China sales.

Shares in Electrolux (Other OTC: ELUXF - news) were among the top gainers, rising 12.3 percent after the global home appliances maker forecast decent market growth on both sides of the north Atlantic (Shanghai: 600558.SS - news) this year.

Nordea, the Nordic region's biggest bank by market value, also rallied, up 6.7 percent after it reported fourth-quarter operating profit in line with expectations on Wednesday and raised its dividend.

Today's European research round-up (Editing by Catherine Evans)