From 4735f3be687209985a0882c5138a2a786e7ac747 Mon Sep 17 00:00:00 2001
From: Scott Sanderson <ssanderson@quantopian.com>
Date: Mon, 27 Nov 2017 17:01:33 -0500
Subject: [PATCH] PERF: We already have nan cached as a local.

---
 zipline/pipeline/factors/statistical.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zipline/pipeline/factors/statistical.py b/zipline/pipeline/factors/statistical.py
index 4e405ad94a..52b6cdd7ec 100644
--- a/zipline/pipeline/factors/statistical.py
+++ b/zipline/pipeline/factors/statistical.py
@@ -596,7 +596,7 @@ def vectorized_beta(dependents, independent, allowed_missing, out=None):
     N, M = dependents.shape
 
     if out is None:
-        out = np.full(M, np.nan)
+        out = np.full(M, nan)
 
     # Copy N times as a column vector and fill with nans to have the same
     # missing value pattern as the dependent variable.