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 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)