Retail same-store sales excluding Walmart stayed positive, but weakened in November compared with October, Retail Forward reports. Most retailers reported strong results for the Black Friday weekend, but weaker results earlier in the month. Sales-weighted same-store sales excluding Walmart weakened to a 0.9% gain in November for 31 retailers-most of them apparel retailers-reporting monthly results today. That was worse than the 2.3% gain last month, but better than the 7.7% decline in Novembe...