noun, verb, spiked, spik⋅ing.| 1. | a naillike fastener, 3 to 12 in. (7.6 to 30.5 cm) long and proportionately thicker than a common nail, for fastening together heavy timbers or railroad track. |
| 2. | something resembling such a nail; a stiff, sharp-pointed piece or part: to set spikes in the top of a cement wall. |
| 3. | a sharp-pointed piece of metal set with the point outward, as on a weapon. |
| 4. | an abrupt increase or rise: a chart showing a spike of unusual activity in the stock market; a sudden spike of electrical current. |
| 5. | a rectangular or naillike metal projection on the heel and sole of a shoe for improving traction, as of a baseball player or a runner. |
| 6. | spikes, a pair of shoes having such projections. |
| 7. | the unbranched antler of a young deer. |
| 8. | Botany. a flower stalk. |
| 9. | a pointed portion of a continuous curve or graph, usually rising above the adjacent portion: a spike in the value of the voltage. |
| 10. | Volleyball. a hard smash, hit close to the net, almost straight down into the opponent's court. |
| 11. | Slang. a hypodermic needle. |
| 12. | to fasten or secure with a spike or spikes. |
| 13. | to provide or set with a spike or spikes. |
| 14. | to pierce with or impale on a spike. |
| 15. | to set or stud with something suggesting spikes. |
| 16. | to injure (another player or a competitor) with the spikes of one's shoe, as in baseball. |
| 17. | Volleyball. to hit (a ball in the air) with a powerful, overarm motion from a position close to the net so as to cause it to travel almost straight down into the court of the opponents. |
| 18. | Football. to slam (the ball) to the ground in the end zone, after scoring a touchdown. |
| 19. | to render (a muzzle-loading gun) useless by driving a spike into the touchhole. |
| 20. | to make ineffective; frustrate or thwart: to spike a rumor; to spike someone's chances for promotion. |
| 21. | Informal.
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| 22. | Journalism Slang. to refuse (a story) by or as if by placing on a spindle. |
| 23. | to rise or increase sharply (often fol. by up): Interest rates spiked up last week. |
| 24. | spike someone's guns. gun 1 (def. 15). |

spike
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Spike
1) The comparatively large upward or downward movement of a price or value level in a short period.
2) The trade order execution confirmation slip which shows all the pertinent data, such as the stock symbol, price, type and trading account information.
Investopedia Commentary
1) A good example of a negative spike in the financial markets is the infamous stock market crash of Oct 19, 1987, when the DJIA plunged 22% in a single day. There are plenty of more common, less drastic examples which are periodically seen in individual stocks when unexpected news or events, such as better-than-expected earnings results, reaches investors.
2) This usage originates from the antiquated practice of placing paper trade order slips on a metal spike upon completion.
Related Links
The Greatest Market Crashes
Understanding Order Execution
The Basics Of Order Entry
See also: Black Monday, Boom, Confirmation, Correction, Crash, Execution, Order, Pump and Dump
Also spelled: spikes, spiking
spike
spike (spīk)
n.
A brief electrical event of 3 to 25 milliseconds that gives the appearance in the electroencephalogram of a rising and falling vertical line.
| spike (spīk) Pronunciation Key
An elongated indeterminate inflorescence in which the flowers are attached directly to a common stem, rather than borne on individual stalks arising from the stem. The gladiolus produces spikes. The distinctive spikes of grasses such as wheat or barley are known as spikelets. See illustration at inflorescence. |
spike jargon
To defeat a selection mechanism by introducing a (sometimes temporary) device that forces a specific result. The word is used in several industries; telephone engineers refer to spiking a relay by inserting a pin to hold the relay in either the closed or open state, and railroaders refer to spiking a track switch so that it cannot be moved. In programming environments it normally refers to a temporary change, usually for testing purposes (as opposed to a permanent change, which would be called hard-coded).
(1999-10-18)