reg --gain stocks
<<<
2009/01/01 Sample 1a
    Assets:Brokerage:Stocks                100 S
    Assets:Brokerage:Cash                 -100 P

P 2009/01/15 00:00:00 S 2 P

2009/02/01 Sample 2a
    Assets:Brokerage:Stocks                100 S @ 1 P
    Assets:Brokerage:Cash

P 2009/02/01 00:00:00 S 4 P

2009/03/01 Sample 3a
    Assets:Brokerage:Stocks                100 S @@ 100 P
    Assets:Brokerage:Cash

P 2009/03/01 00:00:00 S 8 P

2009/04/01 Sample 4a
    Assets:Brokerage:Cash                  100 P
    Assets:Brokerage:Stocks               -100 S {1 P}

P 2009/04/01 00:00:00 S 16 P

; In this usage case, the top amount is always secondary
; 2010/01/01 Sample 1b
;     Assets:Brokerage:Cash               -100 P
;     Assets:Brokerage:Stocks              100 S
; 
; P 2010/01/01 00:00:00 S 2 P

2010/02/01 Sample 2b
    Assets:Brokerage:Cash
    Assets:Brokerage:Stocks                100 S @ 1 P

P 2010/02/01 00:00:00 S 4 P

2010/03/01 Sample 3b
    Assets:Brokerage:Cash
    Assets:Brokerage:Stocks                100 S @@ 100 P

P 2010/03/01 00:00:00 S 8 P

2010/04/01 Sample 4b
    Assets:Brokerage:Stocks               -100 S {1 P}
    Assets:Brokerage:Cash                  100 P

P 2010/04/01 00:00:00 S 16 P
>>>1
09-Jan-01 Sample 1a             As:Brokerage:Stocks               0            0
09-Feb-01 Commodities revalued  <Revalued>                    300 P        300 P
09-Feb-01 Sample 2a             As:Brokerage:Stocks           300 P        600 P
09-Mar-01 Commodities revalued  <Revalued>                    800 P       1400 P
09-Mar-01 Sample 3a             As:Brokerage:Stocks           700 P       2100 P
09-Apr-01 Commodities revalued  <Revalued>                   2400 P       4500 P
09-Apr-01 Sample 4a             As:Brokerage:Stocks         -1500 P       3000 P
10-Feb-01 Commodities revalued  <Revalued>                  -2400 P        600 P
10-Feb-01 Sample 2b             As:Brokerage:Stocks           300 P        900 P
10-Mar-01 Commodities revalued  <Revalued>                   1200 P       2100 P
10-Mar-01 Sample 3b             As:Brokerage:Stocks           700 P       2800 P
10-Apr-01 Commodities revalued  <Revalued>                   3200 P       6000 P
10-Apr-01 Sample 4b             As:Brokerage:Stocks         -1500 P       4500 P
>>>2
=== 0