By Stephen Culp and Chris Prentice NEW YORK/WASHINGTON (Reuters) – Wall Street tumbled in choppy trade on Friday, European shares finished lower but still eked out their first weekly gain of the year as traders grappled with decades-high inflation and the prospect of a tightened rate hike timeline from the U.S. Federal Reserve. Benchmark Treasury yields lost ground, and German bond yields backed off the 2018 highs struck on Thursday. Gold prices were on track for their biggest weekly gain in 3 months amid the inflation worries. Rising oil prices boosted energy shares more than 2%, even as the …