A Comprehensive Guide to the Wilshire 5000 Index

Written by Jeremy Lieber

June 22, 2023

Investors are intimately familiar with indices like the S&P 500, Nasdaq 100, Dow Jones Industrial Average, and Russell 3000. However, there is another lesser-known index that might be crucial for the US stock market. The Wilshire 5000 is a market-cap-weighted stock index that represents the entire US equity market, including most publicly traded companies in the country. Although it doesn’t have the well-known status of its peers, Wilshire 5000 is very important to investors who want to gauge the overall health of the US economy.

In this post, we will provide a comprehensive guide to the Wilshire 5000 index. We will examine how it works, compare it to other popular indices, discuss its advantages and explain why it’s crucial to investors. We will also touch on ticker symbols and charting platforms used to track the index.

How the Wilshire 5000 Works

The Wilshire 5000 is a market-cap-weighted index. This means that stocks with a higher market capitalization (share price multiplied by the number of outstanding shares) carry more weight in the index. The market capitalization-weighting ensures that larger and influential companies have a more significant impact on the index than smaller ones. This approach provides a better representation of the market’s overall health.

The Wilshire 5000 adjusts its components semi-annually, taking into account changes in market capitalization, including new Initial Public Offering (IPOs) and delistings. Unlike the S&P 500, which has a fixed number of components, the Wilshire 5000 doesn’t have a fixed number of companies. As a result, the Wilshire 5000 is considered more accurate in reflecting the entire US stock market.

Advantages of the Wilshire 5000

One of the advantages of the Wilshire 5000 is that it is more representative of the entire US equity market than any other index. Indeed, it includes not only large companies that other indices track but also small and midsize companies that might not be present in other indices. Moreover, unlike other indexes that only measure the returns of significant stocks, the Wilshire 5000 captures the market’s full return, providing a more comprehensive view of the market.

Ticker Symbols and Charting Platforms

The Wilshire 5000 has two ticker symbols: W5000 and ^W5000. However, despite its importance as a market index, it isn’t present on many popular charting platforms. As a result, it’s often overlooked, although its importance can’t be overstated.

Abundance of Market Indices

In today’s world, there is an abundance of market indices. However, the Wilshire 5000 stands tall as one of the most comprehensive and representative of the entire US equity market. Even though it’s not as well-known as its more popular peers, it carries significant importance among investors. By weighing its components effectively and reflecting the stock market’s entire health, it provides a complete picture of the US stock market, including small and midsize companies. Regardless of whether one is an active or passive investor, this index is an essential tool in gauging the US economy’s health and performance.

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