From 8e3cc484dbacab17ed4014bcddde37731ef5f746 Mon Sep 17 00:00:00 2001
From: John Ricklefs <jricklefs@quantopian.com>
Date: Fri, 19 Aug 2016 16:42:28 -0400
Subject: [PATCH] ENH: If no exchange_full provided, use exchange

---
 zipline/assets/_assets.pyx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/zipline/assets/_assets.pyx b/zipline/assets/_assets.pyx
index acd6c03a..40d84997 100644
--- a/zipline/assets/_assets.pyx
+++ b/zipline/assets/_assets.pyx
@@ -88,7 +88,8 @@ cdef class Asset:
         self.symbol = symbol
         self.asset_name = asset_name
         self.exchange = exchange
-        self.exchange_full = exchange_full
+        self.exchange_full = (exchange_full if exchange_full is not None
+                              else exchange)
         self.start_date = start_date
         self.end_date = end_date
         self.first_traded = first_traded