Undercapitalization

Under-capitalization refers to any situation where a business cannot acquire the funds they need. An under-capitalized business may be one that cannot afford current operational expenses due to a lack of capital, which can trigger bankruptcy, may be one that is over-exposed to risk, or may be one that is financially sound but does not have the funds required to expand to meet market demand.
Causes of under-capitalization.
Under-capitalization is often a result of improper financial planning. However, a viable business may have difficulty raising sufficient capital during an economic downturn or in a country that imposes artificial constraints on capital investment.
There are several different causes of undercapitalization, including:
Accountants can structure the financials in order to minimize profit, and thus taxes. As a business grows, this approach becomes counterproductive (Van Horn 2006). Frequently, a growing business will apply for a bank loan only to find their entire accounting system under review.
Capital sources.
A manual on collecting capital, by CPA David Levinson, states that one solid approach to assuring capital is to establish a line of credit, borrow against it, even if it isn’t needed, then pay back this loan. Doing this repeatedly can help a business owner expand their capital when they need to increase their credit or take out a larger loan (Levinson 1998).
A business may acquire capital through re-investment of earnings, through assuming debt or through selling equity. According to Van Horn,
Undercapitalization may result from failure of a business to take advantage of these capital sources, 
or from inability to raise capital using any of these sources.
Bankruptcy of an undercapitalized subsidiary.
When a subsidiary of a corporation files for bankruptcy, there may be reason to suspect that it was deliberately 
undercapitalized and mismanaged for the benefit of the parent corporation. 
The main cause of failure may have been excessive payments to the parent for goods or services provided 
by the parent, or inadequate charges for goods or services provided to the parent. 
In effect, capital provided by other investors was channeled to the parent corporation until the subsidiary failed. 
These cases can be extremely difficult to prove, but the Deep Rock doctrine ensures that the parent corporation's claims are only settled after all other claims.
However, as decided in Walkovszky v. Carlton, the parent corporation is not responsible for settling claims in excess
of remaining assets when an undercapitalized subsidiary fails.
Banking industry.
In the banking industry, undercapitalization refers to having insufficient capital to cover foreseeable risks.
United States.
The Federal Deposit Insurance Corporation (FDIC) classifies banks according to their risk-based capital ratio :
When a bank becomes undercapitalized the FDIC issues a warning to the bank. When the number drops below 6% the FDIC can change management and force the bank to take other corrective action. When the bank becomes critically undercapitalized the FDIC declares the bank insolvent and can take over management of the bank.
The subprime mortgage crisis has shown that banks and other mortgage issuers in the USA were undercapitalized, failing to ensure that they had sufficient capital or insurance to cover the risk of mortgage defaults in the event of the bursting of a housing price bubble. Since the affected institutions were important sources of capital to other industries, this triggered a global financial crisis during 2007-2008.
Macroeconomics.
A country or sector of the economy may be undercapitalized in the sense that businesses in that country or sector are handicapped by lack of affordable investment funds. 
This can be caused by political instability, by lack of confidence in the rule of law, by constraints on foreign direct investment imposed by the government, or by other actions that discourage investment in certain industrial sectors. Examples:
Jeffry A. Frieden notes that during the period of European colonialism the colonial powers encouraged investment in production of raw materials while discouraging investment in industries that would use these materials as inputs in competition with the colonial power's home industries. During the same period, independent developing countries in Latin America and other areas pursued a policy of Import substitution industrialization which diverted capital from other enterprises where these countries had a comparative advantage. Although opposite in intent, both policies had the effect of creating overcapitalization in some sectors and undercapitalization in others.
A contrary view comes from the economist Robert Solow, who was awarded the Nobel prize for his work on the ways in which labor, capital and technical progress contribute to overall economic growth. Among other insights, Solow showed that undercapitalization appears to have less impact on economic growth than would be predicted by earlier economic theories.