add settlement days

documentation/properties/settlement_days.md

@@ -0,0 +1,11 @@
+---
+layout:     property
+title:      "settlement_days"
+schemas:    [security]
+---
+
+# settlement_days
+
+---
+
+The **settlement_days** property specifies the market standard number of days expected for the settlement of the security. The default settlement period is assumed as T+1 for US secutities, where T is the transaction trade_date, and T+2 for all other securities.

v1-dev/security.json

@@ -611,6 +611,10 @@
         "subordinated_unsecured"
       ]
     },
+    "settlement_days": {
+      "description": "The market standard settlement period of the security.",
+      "type": "number"
+    },
     "sft_type": {
       "description": "The sft_type parameter defines the transaction mechanism conducted for the SFT for this security product.",
       "type": "string",