diff --git a/examples/ascii.journal b/examples/ascii.journal
index d2d3a3e25..48d601e3e 100644
--- a/examples/ascii.journal
+++ b/examples/ascii.journal
@@ -1,12 +1,15 @@
-2015-01-01 transaction 1
-  1                                          1
-  1:2                                       -1
+2018-01-01 transaction 1
+  1                                          1 A
+  1:2                                       -1 A
 
-2015-01-02 transaction 2
-  1:2:3                                      1
-  1:2:3:4                                   -1
+2018-01-02 transaction 2
+  1:2:3                                      1 A
+  1:2:3:4                                   -1 A
 
-2015-01-03 transaction 3
-  1:2:3:4:5                                  1
-  1                                         -1
+2018-01-03 transaction 3
+  1:2:3:4:5                                  1 A
+  1                                         -1 A
 
+P 2018-01-01 A  0.70 B
+P 2018-01-02 A  0.71 B
+P 2018-01-03 A  0.72 B
diff --git a/examples/chinese.journal b/examples/chinese.journal
index 685a3fa62..f0850b4bb 100644
--- a/examples/chinese.journal
+++ b/examples/chinese.journal
@@ -1,12 +1,15 @@
-2014-01-01 transaction 1
-  㐀                                          1
-  㐀:㐁                                       -1
+2018-01-01 transaction 1
+  㐀                                          1 A
+  㐀:㐁                                       -1 A
 
-2014-01-02 transaction 2
-  㐀:㐁:㐂                                      1
-  㐀:㐁:㐂:㐃                                   -1
+2018-01-02 transaction 2
+  㐀:㐁:㐂                                      1 A
+  㐀:㐁:㐂:㐃                                   -1 A
 
-2014-01-03 transaction 3
-  㐀:㐁:㐂:㐃:㐄                                  1
-  㐀                                         -1
+2018-01-03 transaction 3
+  㐀:㐁:㐂:㐃:㐄                                  1 A
+  㐀                                         -1 A
 
+P 2018-01-01 A  0.70 B
+P 2018-01-02 A  0.71 B
+P 2018-01-03 A  0.72 B
diff --git a/tools/generatejournal.hs b/tools/generatejournal.hs
index a1e4be5d4..1844f454b 100755
--- a/tools/generatejournal.hs
+++ b/tools/generatejournal.hs
@@ -2,11 +2,12 @@
 {-
 generatejournal.hs NUMTXNS NUMACCTS ACCTDEPTH [--chinese|--mixed]
 
-Outputs a dummy journal file with the specified number of
-transactions, number of accounts, and account tree depth. By default
-it uses only ascii characters, with --chinese it uses wide chinese
-characters, or with --mixed it uses both.  These files are used for
-testing, benchmarking, profiling, etc.
+This generates synthetic journal data for benchmarking & profiling.
+It prints a dummy journal on stdout, with NUMTXNS transactions, one
+per day, using NUMACCTS account names with depths up to ACCTDEPTH.
+It will also contain NUMACCTS P records, one per day.
+By default it uses only ascii characters, with --chinese it uses wide
+chinese characters, or with --mixed it uses both.
 -}
 
 module Main
@@ -30,15 +31,20 @@ main = do
   let dates = iterate (addDays 1) d
   let accts = pair $ cycle $ take numaccts $ uniqueAccountNames opts acctdepth
   mapM_ (\(n,d,(a,b)) -> putStr $ showtxn n d a b) $ take numtxns $ zip3 [1..] dates accts
+  let rates = [0.70, 0.71 .. 1.3]
+  mapM_ (\(d,rate) -> putStr $ showmarketprice d rate) $ take numtxns $ zip dates (cycle $ rates ++ init (tail (reverse rates)))
   return ()
 
 showtxn :: Int -> Day -> String -> String -> String
 showtxn txnno date acct1 acct2 =
-    printf "%s transaction %d\n  %-40s  %2d\n  %-40s  %2d\n\n" d txnno acct1 amt acct2 (-amt)
+    printf "%s transaction %d\n  %-40s  %2d A\n  %-40s  %2d A\n\n" d txnno acct1 amt acct2 (-amt)
     where
       d = show date
       amt = 1::Int
 
+showmarketprice :: Day -> Double -> String
+showmarketprice date rate = printf "P %s A  %.2f B\n" (show date) rate
+
 uniqueAccountNames :: [String] -> Int -> [String]
 uniqueAccountNames opts depth =
   mkacctnames uniquenames