Class: IB::Option

Inherits:
Contract show all
Defined in:
lib/models/ib/option.rb

Constant Summary

Constants inherited from Contract

Contract::Subclasses

Instance Attribute Summary

Attributes inherited from Contract

#description

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Contract

#==, #bag?, #bond?, build, from_ib_ruby, #option?, #serialize, #serialize_ib_ruby, #serialize_legs, #serialize_long, #serialize_short, #serialize_under_comp, #stock?, #to_s, #to_short

Methods included from BaseProperties

#==, #content_attributes, #set_attribute_defaults, #update_missing

Class Method Details

.from_osi(osi) ⇒ Object

Make valid IB Contract definition from OSI (Option Symbology Initiative) code. NB: Simply making a new Contract with local_symbol (osi) property set to a valid OSI code works just as well, just do NOT set expiry, right or strike properties in this case. This class method provided as a backup and shows how to analyse OSI codes.



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# File 'lib/models/ib/option.rb', line 27

def self.from_osi osi

  # Parse contract's OSI (OCC Option Symbology Initiative) code
  args = osi.match(/(\w+)\s?(\d\d)(\d\d)(\d\d)([pcPC])(\d+)/).to_a.drop(1)
  symbol = args.shift
  year = 2000 + args.shift.to_i
  month = args.shift.to_i
  day = args.shift.to_i
  right = args.shift.upcase
  strike = args.shift.to_i/1000.0

  # Set correct expiry date - IB expiry date differs from OSI if expiry date
  # falls on Saturday (see https://github.com/arvicco/option_mower/issues/4)
  expiry_date = Time.utc(year, month, day)
  expiry_date = Time.utc(year, month, day-1) if expiry_date.wday == 6

  new :symbol => symbol,
    :exchange => "SMART",
    :expiry => expiry_date.to_ib[2..7], # YYMMDD
    :right => right,
    :strike => strike
end

Instance Method Details

#default_attributes ⇒ Object 



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# File 'lib/models/ib/option.rb', line 50

def default_attributes
  super.merge :sec_type => :option
  #self[:description] ||= osi ? osi : "#{symbol} #{strike} #{right} #{expiry}"
end

#osi=(value) ⇒ Object 



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# File 'lib/models/ib/option.rb', line 17

def osi= value
  # Normalize to 21 char
  self.local_symbol = value.sub(/ /, ' '*(22-value.size))
end

#to_human ⇒ Object 



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# File 'lib/models/ib/option.rb', line 55

def to_human
  "<Option: " + [symbol, expiry, right, strike, exchange, currency].join(" ") + ">"
end