A market-capitalization weighted index maintained by Dow Jones Indexes that is the large-cap subset of the Dow Jones Wilshire 5000 Composite Index. The Dow Jones Wilshire Large-Cap Index contains the top 750 companies as measured by market capitalization. Taobiz explains Dow Jones Wilshire Large-Cap Index The Dow Jones Wilshire 5000 Composite Index, also known as the Dow Jones Wilshire 5000 Total Market Index, is the most broadly based U.S. stock index. The index is comprised of four segments of market capitalization, each with a different index association. 1) Dow Jones Wilshire U.S. Large-Cap Index: Stocks ranked 1-750 2) Dow Jones Wilshire U.S. Mid-Cap Index: Stocks ranked 501-1000 3) Dow Jones Wilshire U.S. Small-Cap Index: Stocks ranked 751-2500 4) Dow Jones Wilshire U.S. Micro-Cap Index: Stocks ranked 2501+ The mid-cap index contains stocks from both the small- and large-cap indexes.