From 4a991c062b2b833bcf8ee0f263e83009593ad951 Mon Sep 17 00:00:00 2001
From: Thomas Wiecki <thomas.wiecki@gmail.com>
Date: Thu, 16 May 2013 09:12:04 -0400
Subject: [PATCH] BUG: Change trading_days to num_trading_days in repr. Fixes
 #162.

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

diff --git a/zipline/finance/risk.py b/zipline/finance/risk.py
index a346feb2..144470c2 100644
--- a/zipline/finance/risk.py
+++ b/zipline/finance/risk.py
@@ -396,7 +396,7 @@ class RiskMetricsBase(object):
             "algorithm_period_returns",
             "benchmark_period_returns",
             "excess_return",
-            "trading_days",
+            "num_trading_days",
             "benchmark_volatility",
             "algorithm_volatility",
             "sharpe",