IwM

IWM commonly refers to the Imperial War Museums, a United Kingdom public museum network dedicated to recording and interpreting conflicts from World War I to the present. The organization operates a flagship site in London and branches such as IWM North in Manchester and IWM Duxford in Cambridgeshire. It preserves artifacts, archives, and oral histories, and it conducts research, education, and public programming. Its galleries examine topics including civilian life during war, military technology, and the social impact of conflict, with changing exhibitions and extensive online resources for learners and researchers.

IWM is also the ticker symbol for the iShares Russell 2000 ETF, managed by BlackRock. The fund seeks to track the Russell 2000 Index, which measures the performance of small-cap U.S. equities. It is one of the most actively traded U.S. ETFs and provides broad exposure to the small-cap segment. The fund generally uses full replication or sampling to match index weights and rebalances periodically. Investors use IWM to diversify portfolios or gain tactical exposure to U.S. small caps, noting risks such as higher volatility and sector concentration. The expense ratio is modest and the fund trades on major exchanges with high liquidity.

Other uses of the acronym exist in different contexts, but these are the two most widely encountered.