diff --git a/dabo/analyze.sh b/dabo/analyze.sh
index 571ea56..7939266 100755
--- a/dabo/analyze.sh
+++ b/dabo/analyze.sh
@@ -62,7 +62,7 @@ function analyze {
   do
     f_market_perf_date=${f_market_perf_line%,*}
     f_market_perf_date=${f_market_perf_date//[^0-9]/}
-    f_market_perf_date=${f_market_perf_date::-1}
+    f_market_perf_date="${f_market_perf_date::-1}"
     f_market_perf=${f_market_perf_line#*,}
     f_market_performace_array[${f_market_perf_date}]=${f_market_perf}
   done