From 789338aa5fab47b50db209516a11cb940f40692e Mon Sep 17 00:00:00 2001
From: fawce <fawce@quantopian.com>
Date: Thu, 24 May 2012 11:36:22 -0400
Subject: [PATCH] fixed constructor call to provide source_id

---
 zipline/optimize/factory.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zipline/optimize/factory.py b/zipline/optimize/factory.py
index 812c793c..b4edc059 100644
--- a/zipline/optimize/factory.py
+++ b/zipline/optimize/factory.py
@@ -41,7 +41,7 @@ def create_updown_trade_source(sid, trade_count, trading_environment, start_pric
 
     trading_environment.period_end = cur
 
-    source = SpecificEquityTrades(sid, events)
+    source = SpecificEquityTrades("updown_" + str(sid), events)
 
     return source