By Sruthi Shankar and Amruta Khandekar (Reuters) – European shares tumbled on Wednesday as nerves about soaring prices and rising interest rates were aggravated by inflation data from the United States, while mixed earnings reports kept investors on edge about the outlook for corporate profits. The pan-European STOXX 600 index closed down 0.5%, falling for a sixth straight session. However, the index cut some of the losses it had registered following a report that showed U.S. producer prices increased more than expected in September, suggesting inflation remains stubbornly high. The data comes…