Multiple independent and credible financial news outlets report that Morgan Stanley, through analyst Erik Woodring, has explicitly stated Nvidia is the most under-owned mega-cap technology stock. This claim is supported by ownership data showing a significant gap between Nvidia's S&P 500 weighting and its representation in active fund holdings. Articles from recognized sources like Yahoo Finance and Investinglive directly quote or summarize Morgan Stanley's stance, providing consistent and mutually reinforcing accounts. There are no identified contradictions or evidence disputing the statement, and the majority of reports are highly relevant and authoritative in the financial domain. The high consistency across credible sources and the specificity of Morgan Stanley's research make it highly probable that the statement is accurate.