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Definition of 'After-Market Performance'
The price level performance of a newly issued stock after its IPO. There is no standard ending time period that is considered, but after-market performance begins on the first day of trading on the exchange. Typically after-market performance will be measured through the lock-up period, anywhere from three to nine months after the IPO date. This allows for the market to "digest" the insider shares that might be sold quickly after the lock-up period ends. By looking at the after-market performance of all IPOs over a certain time period (as in a calendar year), analysts and investment bankers can determine the overall market demand for new issues, and possibly move up or delay a schedule IPO as a result.
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