European Shares Climb to OneMonth High on Tech Rally and Geopolitical Optimism Dropbox CEO Drew Houston to Step Down After 19 Years Transition to Executive Chairman Rising Bond Yields Complicate BOJs Planned Tapering Strategy Vitalik Buterin Defends Ethereums Unreasonable Ideals Amid Growing Criticism and Price Struggles Weak Market Breadth Sidelines Nifty as Consolidation Persists Nokia NOK Secures UK Appeal Victory in Video Patent Dispute with Acer and Asus SP 500 Climbs as Tech Surge Offsets Energy and Staples Weakness