It appears to be a method for market ticker quotes....
I tried finding an earlier versions but the oldest around online after googling source forging and githubing seem to be 0.4+
Interesting.
//
// Market.h
// Bitcoin
//
// Created by Rits Plasman on 10-06-11.
// Copyright 2011 __MyCompanyName__. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface Market : NSObject <NSCoding> {
}
@property (nonatomic, assign) double close;
@property (nonatomic, assign) double previousClose;
@property (nonatomic, copy) NSString *symbol;
@property (nonatomic, retain) NSDate *latestTrade;
@end