Purchasing options with the same expiration dates but different strike prices.
Related information about perpendicular spread:
- What is vertical spread? - BusinessDictionary.com
 ... a matching option is sold that has the same class and expiration date but a   different strike price. Also called perpendicular spread or price spread.
 
- Perpendicular Period - The Free Dictionary
 Perpendicular spread · Perpendicular Spreads · Perpendicular Standing Spin   Wave · Perpendicular Storage · perpendicular style · perpendicular style ...
 
- perpendicular - The Free Dictionary
 Perpendicular spread · Perpendicular Spreads · Perpendicular Standing Spin   Wave · Perpendicular Storage · perpendicular style · perpendicular style ...
 
- Spreads
 Vertical Spread (Perpendicular Spread or Price Spread). A Vertical Spread is   produced by the simultaneous purchase and sale of options with different strike ...
 
- What is vertical spread? definition and meaning - InvestorWords.com
 diagonal spread · spread · spread · perpendicular spread · front spread · bull call   spread · spread · bear spread · iron condor · bull put spread. Browse by Letter: ...
 
- Vertical Bear Spread
 The number of contracts purchased equals the number sold, and both options   expire on the same date. Also called Perpendicular Spread, Money Spread.
 
- 5xlO-3 - Brookhaven National Laboratory
 energy spread before extraction was about 0.1 eV; measured perpendicular   spread was under 0.5 eV (limited by measurement resolution). To match ion   beam ...
 
- Effects of Relativistic Thermal Velocity Spread of Beam on ...
 the y and z directions (perpendicular spread), and Θ(x) is a step function. In Eq. (  7), the minus and plus signs signify the beam and the background plasma, ...