The process of underwriting shares is the provision of a guarantee or insurance by an underwriter to a company that its shares, when they are offered to the public, will be subscribed in full.
This means that the money the company wishes to raise by issuing shares is guaranteed to be raised by their action. Of course, this means the underwriter, which can be a specialist in the field, or a financial institution like a bank, must sign a document agreeing that if the shares are not fully subscribed by the market, they the underwriters will subscribe for them themselves, guaranteeing the money is raised, and potentially taking a significant interest in the company themselves if the shares prove less attractive to the market than they predicted.
This means that the underwriter assumes the risk when a share-flotation is launched, and also the responsibility to ensure that the shares are made attractive to potential buyers. In essence, underwriting shares is akin to a statement of confidence in the attractiveness of those shares, backed with the underwriter's own money. The company whose shares are being sold wins, because they are guaranteed the degree of profit they want, while the underwriter, which essentially assumes ownership of the shares and responsibility for selling them, could benefit if the shares are heavily subscribed, as this will push up the share price, and make them a profit on sale.
Underwriting is usually only undertaken when a share issue is first launched, as the mechanics of the operation rather depend on the surprise of the market - in subsequent share issues, the company and the underwriter both have experience of the market reaction to the shares, and can make more sound economic judgments based on that experience.
This means that the money the company wishes to raise by issuing shares is guaranteed to be raised by their action. Of course, this means the underwriter, which can be a specialist in the field, or a financial institution like a bank, must sign a document agreeing that if the shares are not fully subscribed by the market, they the underwriters will subscribe for them themselves, guaranteeing the money is raised, and potentially taking a significant interest in the company themselves if the shares prove less attractive to the market than they predicted.
This means that the underwriter assumes the risk when a share-flotation is launched, and also the responsibility to ensure that the shares are made attractive to potential buyers. In essence, underwriting shares is akin to a statement of confidence in the attractiveness of those shares, backed with the underwriter's own money. The company whose shares are being sold wins, because they are guaranteed the degree of profit they want, while the underwriter, which essentially assumes ownership of the shares and responsibility for selling them, could benefit if the shares are heavily subscribed, as this will push up the share price, and make them a profit on sale.
Underwriting is usually only undertaken when a share issue is first launched, as the mechanics of the operation rather depend on the surprise of the market - in subsequent share issues, the company and the underwriter both have experience of the market reaction to the shares, and can make more sound economic judgments based on that experience.