European shares end flat after volatile day; energy, Spain up
* FTSEurofirst edges down 0.04 pct after Monday's fall
* Oil prices show signs of stabilising, Spain rebounds
* USG People surges after Japanese takeover offer
* Finland's Innofactor also rises on merger plan (Adds details, closing prices)
By Sudip Kar-Gupta and Danilo Masoni
LONDON/MILAN, Dec 22 (Reuters) - European stocks ended little changed on Tuesday after a volatile day but energy plays rose as oil prices recovered, while Spanish equities rebounded following a sell-off in the previous session prompted by concerns over a political stalemate.
The pan-European FTSEurofirst 300 index, which had fallen 1.2 percent on Monday, edged down 0.04 percent, while the euro zone's blue-chip Euro STOXX 50 index was up 0.04 percent.
Trading was volatile as the holiday season approached and some investors remained cautious over prospects for next year.
"There are no easy gains to make," said Marco Vailati, head of research and investment at Italy's Cassa Lombarda. Continuación...