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Market capitalization, sometimes referred to as market cap, is the total value of a publicly traded company's outstanding common shares owned by stockholders.<ref name=":1">Template:Cite book</ref>

Market capitalization is equal to the market price per common share multiplied by the number of common shares outstanding.<ref name=":1"/><ref name="investmcd">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

DescriptionEdit

Market capitalization is sometimes used to rank the size of companies. It measures only the equity component of a company's capital structure, and does not reflect management's decision as to how much debt (or leverage) is used to finance the firm. A more comprehensive measure of a firm's size is enterprise value (EV), which gives effect to outstanding debt, preferred stock, and other factors. For insurance firms, a value called the embedded value (EV) has been used.

It is also used in ranking the relative size of stock exchanges, being a measure of the sum of the market capitalizations of all companies listed on each stock exchange. The total capitalization of stock markets or economic regions may be compared with other economic indicators (e.g. the Buffett indicator). The approximate total market capitalization of all publicly traded companies was:

  • 2023: US$111 trillion<ref>{{#invoke:citation/CS1|citation

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  • 2024: US$126 trillion<ref>{{#invoke:citation/CS1|citation

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Historical estimates of world market capEdit

Total market capitalization of all publicly traded companies in the world from 1975 to 2020.<ref name=":0">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Year World market cap Number of
listed
companies
(in mil. US$) (% of GDP)
1975 1,149,245 27.2 14,577
1980 2,525,736 29.6 17,273
1985 4,684,978 47.0 20,555
1990 9,519,107 50.8 23,732
1991 11,340,785 56.8 24,666
1992 10,819,256 50.2 24,947
1993 13,897,390 61.7 28,300
1994 14,639,924 60.9 30,290
1995 17,263,728 64.0 33,379
1996 19,806,691 72.3 35,617
1997 22,029,761 80.7 36,946
1998 24,555,201 89.6 37,928
1999 33,181,159 115.1 38,414
2000 30,925,434 101.1 39,892
2001 26,792,162 88.4 40,157
2002 22,802,792 72.7 38,894
2003 31,107,425 84.9 41,051
2004 36,540,980 89.2 38,724
2005 40,512,446 92.6 39,096
2006 50,074,966 106.1 43,104
2007 60,456,082 114.0 44,034
2008 32,418,516 56.2 43,949
2009 47,471,293 83.8 42,669
2010 54,259,518 87.3 43,427
2011 47,521,341 68.8 44,323
2012 54,503,237 78.4 43,772
2013 64,367,842 89.0 44,853
2014 67,177,254 90.3 45,743
2015 62,268,184 94.5 43,983
2016 65,117,714 97.1 43,806
2017 79,501,948 111.1 43,440
2018 68,893,044 91.9 43,554
2019 78,825,583 108.4 43,248
2020 93,686,226 134.7 49,839
2021 111,159,259 131.8 51,337
2022 93,688,922 106.2 47,926
2025 159,360,000 158.1 48,669

CalculationEdit

Market cap is given by the formula <math display="inline"> \text{MC} = N \times P </math>, where MC is the market capitalization, N is the number of common shares outstanding, and P is the market price per common share.<ref name=":1"/>

For example, if a company has 4 million common shares outstanding and the closing price per share is $20, its market capitalization is then $80 million. If the closing price per share rises to $21, the market cap becomes $84 million. If it drops to $19 per share, the market cap falls to $76 million. This is in contrast to mercantile pricing where purchase price, average price and sale price may differ due to transaction costs.

Not all of the outstanding shares trade on the open market. The number of shares trading on the open market is called the float. It is equal to or less than N because N includes shares that are restricted from trading. The free-float market cap uses just the floating number of shares in the calculation, generally resulting in a smaller number.

Market cap termsEdit

Traditionally, companies were divided into large-cap, mid-cap, and small-cap.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref name="investmcd" /> The terms mega-cap and micro-cap have since come into common use,<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref><ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> and nano-cap is sometimes heard. Large caps have a slow growth rate as compared to small caps.<ref name=":1" /> Different numbers are used by different indexes;<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> there is no official definition of, or full consensus agreement about, the exact cutoff values. The cutoffs may be defined as percentiles rather than in nominal dollars. The definitions expressed in nominal dollars need to be adjusted over decades due to inflation, population change, and overall market valuation (for example, $1 billion was a large market cap in 1950, but it is not very large now), and market caps are likely to be different country to country.

In the United StatesEdit

FINRA's investor education materials state that the following is a typical (not official) categorization of stocks by market capitalization:<ref name="finra-mktcap"/>

Market cap categories per FINRA<ref name="finra-mktcap">{{#invoke:citation/CS1|citation
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Category Market capitalization of individual stock
(US$ billions)
(FINRA, 2022) (GDP deflator adjusted to Template:Inflation/year US$)Template:Inflation/fn
Mega-cap ≥ $200 ≥ $Template:Inflation
Large-cap $10Template:Snd$200 $Template:InflationTemplate:Snd$Template:Inflation
Mid-cap $2Template:Snd$10 $Template:InflationTemplate:Snd$Template:Inflation
Small-cap $0.25Template:Snd$2 $Template:InflationTemplate:Snd$Template:Inflation
Micro-cap < $0.25 < $Template:Inflation

The U.S. Securities and Exchange Commission notes that nano-cap stocks, in cases when they're separated from micro-caps, are typically defined as stocks with a market capitalization less than $50 million (as of 2013);<ref name="sec-micro-guide">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> which is equivalent to less than $Template:Inflation million in Template:Inflation/year.Template:Inflation/fn

S&P Dow Jones Indices defines 3 major US indices segmented by market capitalization. The components of these indices are selected by committee, but in order to be eligible, among other requirements,<ref name="sp-methodology">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> a stock's market capitalization at the time of addition must be within the respective range in the following table:

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Index Category Market capitalization required for addition
S&P 500 Large-cap ≥ US$20.5 billion
S&P 400 Mid-cap $7.4 billionTemplate:Snd$20.5 billion
S&P 600 Small-cap $1 billionTemplate:Snd$7.4 billion

These market cap eligibility criteria are only for addition to these indices, not for continued membership in an index. As a result, an S&P index constituent that appears to violate criteria for addition to that index is not removed unless ongoing conditions warrant an index change.<ref name="sp2025-01-02"/>

See alsoEdit

ReferencesEdit

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External linksEdit

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