From b65f7f42c04e49c02adc377531b0aff53dc1c9dd Mon Sep 17 00:00:00 2001
From: Eddie Hebert <ehebert@quantopian.com>
Date: Tue, 1 Oct 2013 11:23:32 -0400
Subject: [PATCH] BUG: Fix updating treasury curves.

A transpose back to the serialization shape was left out.

Also, fixes empty return from update.
---
 zipline/data/loader.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/zipline/data/loader.py b/zipline/data/loader.py
index 741ea3f8..8115a617 100644
--- a/zipline/data/loader.py
+++ b/zipline/data/loader.py
@@ -108,9 +108,11 @@ def update_treasury_curves(last_date):
     updated_curves = curves.T
 
     datafile = get_datafile('treasury_curves.csv', mode='wb')
-    updated_curves.to_csv(datafile)
+    updated_curves.T.to_csv(datafile)
     datafile.close()
 
+    return updated_curves
+
 
 def update_benchmarks(symbol, last_date):
     """