diff --git a/mba/ch50.org b/mba/ch50.org
index 457ae72..95d93b0 100644
--- a/mba/ch50.org
+++ b/mba/ch50.org
@@ -51,3 +51,9 @@ these can also be found in every company
 1. go see similar publicly traded companies and find out what percent of revenue/sales
    - security and exchange commision requires all publicly traded companies to put this up
 2. from the initial point we make assumptions
+
+** every ting is based on percentage of sales
+- stock market is paying 10x revenue
+- paying 10x eps for 'value investors'
+- assume an IPO in 5 years
+- GARP (growwth at a reasonable price)