European stock markets held back by slide in Greek shares
* Greek banking stocks drop on ECB move
* FTSEurofirst 300 index closes flat at 1,487.81 points
* Swiss market falls as government warns of franc impact
* But Greek worries are offset by ECB's new QE programme
* Dassault Systemes rises on bullish outlook
By Sudip Kar-Gupta and Blaise Robinson
LONDON/PARIS, Feb 5 (Reuters) - Greek shares dropped on Thursday, holding back European stock markets, after the European Central Bank abruptly cancelled its acceptance of Greek bonds in return for funding.
Greek banking stocks sank, with the Athens Stock Exchange FTSE Banks Index dropping 10 percent, driving Greece's broader ATG equity index down by 3.4 percent.
Shares in National Bank of Greece fell 12.3 percent and Bank of Piraeus declined 15 percent. Greek shares regained some ground after the ECB let the Greek central bank offer lenders emergency funding of up to 60 billion euros ($68.6 billion). Continuación...