diff --git a/src/main/java/co/fineants/api/domain/portfolio/reactive/PortfolioObserver.java b/src/main/java/co/fineants/api/domain/portfolio/reactive/PortfolioObserver.java
index 54a0a4f6..6c715fa9 100644
--- a/src/main/java/co/fineants/api/domain/portfolio/reactive/PortfolioObserver.java
+++ b/src/main/java/co/fineants/api/domain/portfolio/reactive/PortfolioObserver.java
@@ -25,7 +25,7 @@ public static PortfolioObserver create(SseEmitter emitter) {
 
 	@Override
 	public void onSubscribe(@NonNull Disposable d) {
-		throw new UnsupportedOperationException("Not implemented");
+		log.info("subscribe portfolio emitter {}", emitter.toString());
 	}
 
 	@Override