* STOXX 600 down 0.4 pct, blue chips flat
* Stronger euro weighs on exporters
* Nordea drags on banks after Q2 undershoots expectations
By Kit Rees
LONDON, July 20 (Reuters) - European shares dropped on Thursday as a jump in the bloc's currency following the European Central Bank's policy meeting weighed on exporters, while disappointing updates prompted big moves on individual stocks.
The pan-European STOXX 600 ended 0.4 percent lower in a choppy session, reversing earlier gains as a spike in the euro dragged on export-oriented stocks.
The rally in both the currency and bond yields came after the ECB left its ultra easy monetary policy unchanged, and President Mario Draghi said that policymakers would discuss potential tweaks to its bond-buying programme in the autumn.
Europe's basic resources sector was the biggest faller, down 1.9 percent, while export-heavy aerospace and defence firms and autos also came under pressure.
A rising currency has become a concern for investors as the second-quarter earnings season rolls around, with strategists at Deutsche Bank (IOB: 0H7D.IL - news) warning that every 10 percent move in the euro takes 5 percent off the STOXX 600's earnings.
The euro has gained nearly 11 percent so far this year against the dollar.
“Since Draghi recently joined several other central banks with a more hawkish sounding stance on the future of QE and interest rates, we have seen a sharp rise in both Euro area government bond yields and the euro relative to other major currencies," Jake Robbins, manager of the Premier Global Alpha Growth Fund at Premier Asset Management (LSE: PAM.L - news) , said in note.
European banks were 0.4 percent weaker, led lower by a 5.2 percent drop in Nordea's shares.
The Nordic region's biggest bank by market value fell after reporting second-quarter operating earnings below analysts' estimates, while Danske Bank (LSE: 0NVC.L - news) retreated 1.4 percent after its quarterly earnings.
Germany's Lufthansa led the travel and leisure sector down with a 8.6 percent drop, while British budget airline easyJet fell nearly 6 percent after cautious comments on the outlook for summer pricing.
(Reporting by Kit Rees, Julien Ponthus and Helen Reid; editing by Alexander Smith)