diff --git a/libraries/app/application.cpp b/libraries/app/application.cpp
index 66dcfbc7..08f14d35 100644
--- a/libraries/app/application.cpp
+++ b/libraries/app/application.cpp
@@ -4,7 +4,7 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
  *
- * 1. Any modified source or binaries are used only with the BitShares network.
+ * 1. Any modified source or binaries are used only with the MUSE network.
  *
  * 2. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
  *
diff --git a/libraries/chain/asset_evaluator.cpp b/libraries/chain/asset_evaluator.cpp
index 81f35fb2..e43e4feb 100644
--- a/libraries/chain/asset_evaluator.cpp
+++ b/libraries/chain/asset_evaluator.cpp
@@ -52,7 +52,7 @@ void_result asset_create_evaluator::do_evaluate( const asset_create_operation& o
    auto dotpos = op.symbol.find( '.' );
    if( dotpos != std::string::npos  && d.head_block_time() > HARDFORK_385_TIME ) {
       auto prefix = op.symbol.substr( 0, dotpos );
-      auto asset_symbol_itr = asset_indx.find( op.symbol );
+      auto asset_symbol_itr = asset_indx.find( prefix );
       FC_ASSERT( asset_symbol_itr != asset_indx.end(), "Asset ${s} may only be created by issuer of ${p}, but ${p} has not been registered",
                  ("s",op.symbol)("p",prefix) );
       FC_ASSERT( asset_symbol_itr->issuer == op.issuer, "Asset ${s} may only be created by issuer of ${p}, ${i}",
diff --git a/libraries/chain/asset_object.cpp b/libraries/chain/asset_object.cpp
index d08e0e43..91862e4d 100644
--- a/libraries/chain/asset_object.cpp
+++ b/libraries/chain/asset_object.cpp
@@ -43,7 +43,19 @@ share_type asset_bitasset_data_object::max_force_settlement_volume(share_type cu
 void graphene::chain::asset_bitasset_data_object::update_median_feeds(time_point_sec current_time)
 {
    current_feed_publication_time = current_time;
+   auto cutoff = current_time - options.feed_lifetime_sec;
+
+   for( auto itr = feeds.begin(); itr != feeds.end(); )
+   {
+      if( itr->second.first < cutoff )
+         itr = feeds.erase(itr);
+      else
+         ++itr;
+   }
+
+
    vector<std::reference_wrapper<const price_feed>> current_feeds;
+   current_feeds.reserve(feeds.size());
    for( const pair<account_id_type, pair<time_point_sec,price_feed>>& f : feeds )
    {
       if( (current_time - f.second.first).to_seconds() < options.feed_lifetime_sec &&
diff --git a/libraries/chain/db_update.cpp b/libraries/chain/db_update.cpp
index 1fc7fc83..a3c1cab0 100644
--- a/libraries/chain/db_update.cpp
+++ b/libraries/chain/db_update.cpp
@@ -233,11 +233,13 @@ bool database::check_for_blackswan( const asset_object& mia, bool enable_black_s
     auto least_collateral = call_itr->collateralization();
     if( ~least_collateral >= highest  ) 
     {
-       elog( "Black Swan detected: \n"
+       elog( "Black Swan detected ${s}/${s1}: \n"
              "   Least collateralized call: ${lc}  ${~lc}\n"
            //  "   Highest Bid:               ${hb}  ${~hb}\n"
              "   Settle Price:              ${sp}  ${~sp}\n"
              "   Max:                       ${h}   ${~h}\n",
+             ("s", settle_price.base.asset_id(*this).symbol )
+             ("s1", settle_price.quote.asset_id(*this).symbol )
             ("lc",least_collateral.to_real())("~lc",(~least_collateral).to_real())
           //  ("hb",limit_itr->sell_price.to_real())("~hb",(~limit_itr->sell_price).to_real())
             ("sp",settle_price.to_real())("~sp",(~settle_price).to_real())
@@ -366,11 +368,17 @@ void database::clear_expired_orders()
 
 void database::update_expired_feeds()
 {
-   auto& asset_idx = get_index_type<asset_index>().indices();
-   for( const asset_object& a : asset_idx )
+   auto& asset_idx = get_index_type<asset_index>().indices().get<by_type>();
+   auto itr = asset_idx.lower_bound( true /** market issued */ );
+   //for( const asset_object& a : asset_idx )
+   while( itr != asset_idx.end() )
    {
+      const asset_object& a = *itr;
+      ++itr;
+      /*
       if( !a.is_market_issued() )
          continue;
+      */
 
       const asset_bitasset_data_object& b = a.bitasset_data(*this);
       if( b.feed_is_expired(head_block_time()) )
diff --git a/libraries/chain/include/graphene/chain/asset_object.hpp b/libraries/chain/include/graphene/chain/asset_object.hpp
index 4496fe03..c05673a8 100644
--- a/libraries/chain/include/graphene/chain/asset_object.hpp
+++ b/libraries/chain/include/graphene/chain/asset_object.hpp
@@ -227,11 +227,13 @@ namespace graphene { namespace chain {
    typedef flat_index<asset_bitasset_data_object> asset_bitasset_data_index;
 
    struct by_symbol;
+   struct by_type;
    typedef multi_index_container<
       asset_object,
       indexed_by<
          ordered_unique< tag<by_id>, member< object, object_id_type, &object::id > >,
-         ordered_unique< tag<by_symbol>, member<asset_object, string, &asset_object::symbol> >
+         ordered_unique< tag<by_symbol>, member<asset_object, string, &asset_object::symbol> >,
+         ordered_non_unique< tag<by_type>, const_mem_fun<asset_object, bool, &asset_object::is_market_issued> >
       >
    > asset_object_multi_index_type;
    typedef generic_index<asset_object, asset_object_multi_index_type> asset_index;