GLOBAL MARKETS-Portugal woes sink European stocks

(Adds details of Greek sale)

* Earnings, valuations concerns dominate in Europe

* Shares in top listed Portuguese bank BES fall 15 pct

* Dollar steadies after overnight fall

* China's trade data not as strong as expected, reaction limited

By Patrick Graham

LONDON, July 10 (Reuters) - Europe's debt-sodden periphery was back on investors' list of concerns for the first time this year on Thursday, troubles around Portugal's biggest listed bank pushing shares lower and quelling demand for an issue of bonds by Greece.

The noise around BES, whose shares plunged more than 15 percent, drowned out any support for sentiment from Federal Reserve minutes read as showing the U.S. central bank little closer to an outright rise in interest rates.

Stock markets in Germany and France fell around 1.5 percent while Norway's, also hurt by poor results for its own biggest commercial lender, was down 2 percent.

Yields on bonds issued by the southern European governments at the heart of four years of turmoil for the euro zone rose across the board and Greece managing to place just half of a planned 3 billion euro bond placement.

"It is not ideal timing given all the concerns the market has on Portugal," said Michael Michaelides, a rates analyst at RBS in London.

"We've seen a very strong sale in Ireland. The broader correlation still stands in the periphery  but now you see increasingly that when there is a particular story in one country, that market moves a lot more than the others."

Also playing in to the concerns around the euro zone's southern half were data showing the steepest drop in Italian industrial output in almost two years.

U.S. stock futures pointed to a fall of almost one percent at opening.

STRETCHED

Faith in a rally in shares that dates back to August 2011 has been more shaky over the past month than for some time, as the Fed nears what looks like a definitive end to its programme of new money-printing.

There has been no shortage of warnings that the era of ultra-loose policy may have created a new stock market bubble and another round of financial problems in Italy, Spain, Portugal or Greece, absent for the best part of a year, would be worrying in that light.

The minutes from the U.S. central bank's last meeting, published after European markets had closed on Wednesday, offered no sign it was any closer to following an end to bond-buying with a swift rise in official interest rates.

That boosted U.S. and Asian markets overnight. But the dominant concern in Europe was companies' results and the economy's ability to survive without the new funds which the Fed's bond-buying has forced into the system every month.