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bal etc.: replace --value=transaction with --value=cost (#329)

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This commit is contained in:
Simon Michael 2019-05-23 20:52:21 -07:00
parent adbce22152
commit 9977739c76
5 changed files with 67 additions and 141 deletions
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9
hledger-lib/Hledger/Reports/BalanceReport.hs
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@ -71,11 +71,7 @@ balanceReport ropts@ReportOpts{..} q j =
-- dbg1 = const id -- exclude from debug output -- dbg1 = const id -- exclude from debug output
dbg1 s = let p = "balanceReport" in Hledger.Utils.dbg1 (p++" "++s) -- add prefix in debug output dbg1 s = let p = "balanceReport" in Hledger.Utils.dbg1 (p++" "++s) -- add prefix in debug output
-- We may be converting amounts to value, according to --value-at: today = fromMaybe (error' "balanceReport: ReportOpts today_ is unset so could not satisfy --value=now") today_
-- transaction: value each posting at posting date before summing
-- period: value totals at period end
-- date: value totals at date
today = fromMaybe (error' "balanceReport: ReportOpts today_ is unset so could not satisfy --value-at=now") today_
-- For --value-at=transaction, convert all postings to value before summing them. -- For --value-at=transaction, convert all postings to value before summing them.
-- The report might not use them all but laziness probably helps here. -- The report might not use them all but laziness probably helps here.
@ -83,9 +79,10 @@ balanceReport ropts@ReportOpts{..} q j =
| otherwise = j | otherwise = j
-- Get all the summed accounts & balances, according to the query, as an account tree. -- Get all the summed accounts & balances, according to the query, as an account tree.
-- If doing cost valuation, amounts will be converted to cost first.
accttree = ledgerRootAccount $ ledgerFromJournal q $ journalSelectingAmountFromOpts ropts j' accttree = ledgerRootAccount $ ledgerFromJournal q $ journalSelectingAmountFromOpts ropts j'
-- For --value-at=(all except transaction, done above), convert the summed amounts to value. -- For other kinds of valuation, convert the summed amounts to value.
valuedaccttree = mapAccounts valueaccount accttree valuedaccttree = mapAccounts valueaccount accttree
where where
valueaccount a@Account{..} = a{aebalance=val aebalance, aibalance=val aibalance} valueaccount a@Account{..} = a{aebalance=val aebalance, aibalance=val aibalance}

2
hledger-lib/Hledger/Reports/BudgetReport.hs
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@ -276,7 +276,7 @@ budgetReportAsText ropts@ReportOpts{..} budgetr@(PeriodicReport ( _, rows, _)) =
title = printf "Budget performance in %s%s:" title = printf "Budget performance in %s%s:"
(showDateSpan $ budgetReportSpan budgetr) (showDateSpan $ budgetReportSpan budgetr)
(case value_ of (case value_ of
Just (AtCost _mc) -> ", valued at transaction dates" Just (AtCost _mc) -> ", valued at cost"
Just (AtEnd _mc) -> ", valued at period ends" Just (AtEnd _mc) -> ", valued at period ends"
Just (AtNow _mc) -> ", current value" Just (AtNow _mc) -> ", current value"
Just (AtDate d _mc) -> ", valued at "++showDate d Just (AtDate d _mc) -> ", valued at "++showDate d

193
hledger-lib/Hledger/Reports/MultiBalanceReports.hs
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@ -90,7 +90,7 @@ type ClippedAccountName = AccountName
multiBalanceReport :: ReportOpts -> Query -> Journal -> MultiBalanceReport multiBalanceReport :: ReportOpts -> Query -> Journal -> MultiBalanceReport
multiBalanceReport ropts@ReportOpts{..} q j@Journal{..} = multiBalanceReport ropts@ReportOpts{..} q j@Journal{..} =
(if invert_ then mbrNegate else id) $ (if invert_ then mbrNegate else id) $
MultiBalanceReport (colspans, sortedrowsvalued, totalsrow) MultiBalanceReport (colspans, sortedrows, totalsrow)
where where
dbg1 s = let p = "multiBalanceReport" in Hledger.Utils.dbg1 (p++" "++s) -- add prefix in this function's debug output dbg1 s = let p = "multiBalanceReport" in Hledger.Utils.dbg1 (p++" "++s) -- add prefix in this function's debug output
-- dbg1 = const id -- exclude this function from debug output -- dbg1 = const id -- exclude this function from debug output
@ -137,75 +137,46 @@ multiBalanceReport ropts@ReportOpts{..} q j@Journal{..} =
matchedspan = dbg1 "matchedspan" $ postingsDateSpan' (whichDateFromOpts ropts) ps matchedspan = dbg1 "matchedspan" $ postingsDateSpan' (whichDateFromOpts ropts) ps
---------------------------------------------------------------------- ----------------------------------------------------------------------
-- 2. Things we'll need for valuation, if -V/--value-at are present. -- 2. Things we'll need if doing valuation.
-- Valuation complicates this report quite a lot.
-- Here's the current intended effect of --value-at on each part of the report: -- Here's the current intended effect of --value on each part of the report:
-- -H starting balances: -- -H/--historical starting balances:
-- transaction: sum of values of previous postings on their posting dates -- cost: summed cost of previous postings
-- period: value -H starting balances at day before report start -- end: historical starting balances valued at day before report start
-- date: value -H starting balances at date -- date: historical starting balances valued at date
-- table cells: -- table cells:
-- transaction: value each posting before calculating table cell amounts -- cost: summed costs of postings
-- period: value each table cell amount at subperiod end -- end: summed postings, valued at subperiod end
-- date: value each table cell amount at date -- date: summed postings, valued at date
-- column totals: -- column totals:
-- transaction: sum/average the valued cell amounts -- cost: summed column amounts
-- period: sum/average the unvalued amounts and value at subperiod end -- end: summed column amounts
-- date: sum/average the unvalued amounts and value at date -- date: summed column amounts
-- row totals & averages, grand total & average: -- row totals & averages, grand total & average:
-- transaction: sum/average the valued amounts -- cost: summed/averaged row amounts
-- period: sum/average the unvalued amounts and value at report period end -- end: summed/averaged row amounts
-- date: sum/average the unvalued amounts and value at date -- date: summed/averaged row amounts
-- mvalueat = valueTypeFromOpts ropts today = fromMaybe (error' "postingsReport: ReportOpts today_ is unset so could not satisfy --value=now") today_
today = fromMaybe (error' "postingsReport: ReportOpts today_ is unset so could not satisfy --value-at=now") today_
-- Market prices. Sort into date then parse order, -- Market prices. Sort into date then parse order,
-- & reverse for quick lookup of the latest price. -- & reverse for quick lookup of the latest price.
prices = reverse $ sortOn mpdate jmarketprices prices = reverse $ sortOn mpdate jmarketprices
-- A helper for valuing amounts according to --value-at.
maybevalue :: Day -> MixedAmount -> MixedAmount
maybevalue periodlastday amt = case value_ of
Nothing -> amt
Just (AtCost _mc) -> amt -- assume --value-at=transaction was handled earlier
Just (AtEnd _mc) -> mixedAmountValue prices periodlastday amt
Just (AtNow _mc) -> mixedAmountValue prices today amt
Just (AtDate d _mc) -> mixedAmountValue prices d amt
-- The last day of each column subperiod. -- The last day of each column subperiod.
lastdays :: [Day] = lastdays :: [Day] =
map ((maybe map ((maybe
(error' "multiBalanceReport: expected all spans to have an end date") -- XXX should not happen (error' "multiBalanceReport: expected all spans to have an end date") -- XXX should not happen
(addDays (-1))) (addDays (-1)))
. spanEnd) colspans . spanEnd) colspans
-- The last day of the overall report period. -- If doing cost valuation, convert amounts to cost.
reportlastday = j' = journalSelectingAmountFromOpts ropts j
fromMaybe (error' "multiBalanceReport: expected a non-empty journal") -- XXX might happen ? :(
$ reportPeriodOrJournalLastDay ropts j
---------------------------------------------------------------------- ----------------------------------------------------------------------
-- 3. Calculate starting balances (both unvalued and valued), if needed for -H -- 3. Calculate starting balances, if needed for -H
-- Balances at report start date, unvalued, from all earlier postings which otherwise match the query. -- Balances at report start date, from all earlier postings which otherwise match the query.
-- These balances are unvalued except maybe converted to cost.
startbals :: [(AccountName, MixedAmount)] = dbg1 "startbals" $ map (\(a,_,_,b) -> (a,b)) startbalanceitems startbals :: [(AccountName, MixedAmount)] = dbg1 "startbals" $ map (\(a,_,_,b) -> (a,b)) startbalanceitems
where where
(startbalanceitems,_) = dbg1 "starting balance report" $ balanceReport ropts''{value_=Nothing} startbalq j (startbalanceitems,_) = dbg1 "starting balance report" $ balanceReport ropts''{value_=Nothing} startbalq j'
where
ropts' | tree_ ropts = ropts{no_elide_=True}
| otherwise = ropts{accountlistmode_=ALFlat}
ropts'' = ropts'{period_ = precedingperiod}
where
precedingperiod = dateSpanAsPeriod $ spanIntersect (DateSpan Nothing mreportstart) $ periodAsDateSpan period_
-- q projected back before the report start date.
-- When there's no report start date, in case there are future txns (the hledger-ui case above),
-- we use emptydatespan to make sure they aren't counted as starting balance.
startbalq = dbg1 "startbalq" $ And [datelessq, dateqcons precedingspan]
where
precedingspan = case mreportstart of
Just d -> DateSpan Nothing (Just d)
Nothing -> emptydatespan
-- Balances at report start date, maybe valued according to --value-at. XXX duplication
startbalsmaybevalued :: [(AccountName, MixedAmount)] = dbg1 "startbalsmaybevalued" $ map (\(a,_,_,b) -> (a,b)) startbalanceitems
where
(startbalanceitems,_) = dbg1 "starting balance report (maybe valued)" $ balanceReport ropts'' startbalq j
where where
ropts' | tree_ ropts = ropts{no_elide_=True} ropts' | tree_ ropts = ropts{no_elide_=True}
| otherwise = ropts{accountlistmode_=ALFlat} | otherwise = ropts{accountlistmode_=ALFlat}
@ -225,7 +196,6 @@ multiBalanceReport ropts@ReportOpts{..} q j@Journal{..} =
startaccts = dbg1 "startaccts" $ map fst startbals startaccts = dbg1 "startaccts" $ map fst startbals
-- Helpers to look up an account's starting balance. -- Helpers to look up an account's starting balance.
startingBalanceFor a = fromMaybe nullmixedamt $ lookup a startbals startingBalanceFor a = fromMaybe nullmixedamt $ lookup a startbals
valuedStartingBalanceFor a = fromMaybe nullmixedamt $ lookup a startbalsmaybevalued
---------------------------------------------------------------------- ----------------------------------------------------------------------
-- 4. Gather postings for each column. -- 4. Gather postings for each column.
@ -234,24 +204,19 @@ multiBalanceReport ropts@ReportOpts{..} q j@Journal{..} =
ps :: [Posting] = ps :: [Posting] =
dbg1 "ps" $ dbg1 "ps" $
journalPostings $ journalPostings $
filterJournalAmounts symq $ -- remove amount parts excluded by cur: filterJournalAmounts symq $ -- remove amount parts excluded by cur:
filterJournalPostings reportq $ -- remove postings not matched by (adjusted) query filterJournalPostings reportq $ -- remove postings not matched by (adjusted) query
journalSelectingAmountFromOpts ropts j j'
-- Group postings into their columns, with the column end dates. -- Group postings into their columns, with the column end dates.
colps :: [([Posting], Maybe Day)] = colps :: [([Posting], Maybe Day)] =
dbg1 "colps" dbg1 "colps"
[(filter (isPostingInDateSpan' (whichDateFromOpts ropts) s) ps, spanEnd s) | s <- colspans] [(filter (isPostingInDateSpan' (whichDateFromOpts ropts) s) ps, spanEnd s) | s <- colspans]
-- If --value-at=transaction is in effect, convert the postings to value before summing.
colpsmaybevalued :: [([Posting], Maybe Day)] =
case value_ of
Just (AtCost _mc) -> [([postingValue jmarketprices (postingDate p) p | p <- ps], periodend) | (ps,periodend) <- colps]
_ -> colps
---------------------------------------------------------------------- ----------------------------------------------------------------------
-- 5. Calculate account balance changes in each column. -- 5. Calculate account balance changes in each column.
-- In each column, gather the accounts that have postings and their change amount. -- In each column, gather the accounts that have postings and their change amount.
-- Do this for the unvalued postings, and if needed the posting-date-valued postings.
acctChangesFromPostings :: [Posting] -> [(ClippedAccountName, MixedAmount)] acctChangesFromPostings :: [Posting] -> [(ClippedAccountName, MixedAmount)]
acctChangesFromPostings ps = [(aname a, (if tree_ ropts then aibalance else aebalance) a) | a <- as] acctChangesFromPostings ps = [(aname a, (if tree_ ropts then aibalance else aebalance) a) | a <- as]
where where
@ -261,10 +226,8 @@ multiBalanceReport ropts@ReportOpts{..} q j@Journal{..} =
depthLimit depthLimit
| tree_ ropts = filter ((depthq `matchesAccount`).aname) -- exclude deeper balances | tree_ ropts = filter ((depthq `matchesAccount`).aname) -- exclude deeper balances
| otherwise = clipAccountsAndAggregate depth -- aggregate deeper balances at the depth limit | otherwise = clipAccountsAndAggregate depth -- aggregate deeper balances at the depth limit
-- colacctchanges :: [[(ClippedAccountName, MixedAmount)]] = colacctchanges :: [[(ClippedAccountName, MixedAmount)]] =
-- dbg1 "colacctchanges" $ map (acctChangesFromPostings . fst) colps dbg1 "colacctchanges" $ map (acctChangesFromPostings . fst) colps
colacctchangesmaybevalued :: [[(ClippedAccountName, MixedAmount)]] =
dbg1 "colacctchangesmaybevalued" $ map (acctChangesFromPostings . fst) colpsmaybevalued
---------------------------------------------------------------------- ----------------------------------------------------------------------
-- 6. Gather the account balance changes into a regular matrix including the accounts -- 6. Gather the account balance changes into a regular matrix including the accounts
@ -285,7 +248,7 @@ multiBalanceReport ropts@ReportOpts{..} q j@Journal{..} =
dbg1 "colallacctchanges" dbg1 "colallacctchanges"
[sortBy (comparing fst) $ [sortBy (comparing fst) $
unionBy (\(a,_) (a',_) -> a == a') postedacctchanges zeroes unionBy (\(a,_) (a',_) -> a == a') postedacctchanges zeroes
| postedacctchanges <- colacctchangesmaybevalued] | postedacctchanges <- colacctchanges]
where zeroes = [(a, nullmixedamt) | a <- displayaccts] where zeroes = [(a, nullmixedamt) | a <- displayaccts]
-- Transpose to get each account's balance changes across all columns. -- Transpose to get each account's balance changes across all columns.
acctchanges :: [(ClippedAccountName, [MixedAmount])] = acctchanges :: [(ClippedAccountName, [MixedAmount])] =
@ -295,56 +258,33 @@ multiBalanceReport ropts@ReportOpts{..} q j@Journal{..} =
---------------------------------------------------------------------- ----------------------------------------------------------------------
-- 7. Build the report rows. -- 7. Build the report rows.
-- One row per account, with account name info, column amounts, row total and row average. -- One row per account, with account name info, row amounts, row total and row average.
-- Calculate them two ways: unvalued for calculating column/grand totals, and valued for display. -- Row amounts are converted to value if that has been requested.
-- Row total/average are always simply the sum/average of the row amounts.
rows :: [MultiBalanceReportRow] = rows :: [MultiBalanceReportRow] =
dbg1 "rows" $ dbg1 "rows" $
[(a, accountLeafName a, accountNameLevel a, unvaluedbals, rowtot, rowavg) [(a, accountLeafName a, accountNameLevel a, valuedrowbals, rowtot, rowavg)
| (a,changes) <- acctchanges | (a,changes) <- dbg1 "acctchanges" acctchanges
-- The amounts to be displayed (period changes, cumulative totals, or historical balances). -- The row amounts to be displayed: per-period changes,
, let unvaluedbals = case balancetype_ of -- zero-based cumulative totals, or
HistoricalBalance -> drop 1 $ scanl (+) (startingBalanceFor a) changes -- starting-balance-based historical balances.
, let rowbals = dbg1 "rowbals" $ case balancetype_ of
PeriodChange -> changes
CumulativeChange -> drop 1 $ scanl (+) 0 changes CumulativeChange -> drop 1 $ scanl (+) 0 changes
_ -> changes
-- The total and average for the row.
, let rowtot = if balancetype_==PeriodChange then sum unvaluedbals else 0
, let rowavg = averageMixedAmounts unvaluedbals
, empty_ || depth == 0 || any (not . isZeroMixedAmount) unvaluedbals
]
rowsvalued :: [MultiBalanceReportRow] =
dbg1 "rowsvalued" $
[(a, accountLeafName a, accountNameLevel a, valuedbals, valuedrowtot, valuedrowavg)
| (a,changes) <- acctchanges
-- The amounts to be displayed (period changes, cumulative totals, or historical balances).
, let unvaluedbals = case balancetype_ of
HistoricalBalance -> drop 1 $ scanl (+) (startingBalanceFor a) changes HistoricalBalance -> drop 1 $ scanl (+) (startingBalanceFor a) changes
CumulativeChange -> drop 1 $ scanl (+) 0 changes -- The row amounts valued according to --value if needed.
_ -> changes , let valuedrowbals = dbg1 "valuedrowbals" $ case value_ of
-- The amounts valued according to --value-at, if needed. Just (AtCost _mc) -> rowbals -- cost valuation was handled earlier
, let valuedbals1 = case balancetype_ of Just (AtEnd _mc) -> [mixedAmountValue prices periodlastday amt | (amt,periodlastday) <- zip rowbals lastdays]
HistoricalBalance -> drop 1 $ scanl (+) (valuedStartingBalanceFor a) changes Just (AtNow _mc) -> [mixedAmountValue prices today amt | amt <- rowbals]
CumulativeChange -> drop 1 $ scanl (+) 0 changes Just (AtDate d _mc) -> [mixedAmountValue prices d amt | amt <- rowbals]
_ -> changes Nothing -> rowbals
, let valuedbals = case value_ of
Just (AtCost _mc) -> valuedbals1
Just (AtEnd _mc) -> [mixedAmountValue prices periodlastday amt | (amt,periodlastday) <- zip unvaluedbals lastdays]
Just (AtNow _mc) -> [mixedAmountValue prices today amt | amt <- valuedbals1]
Just (AtDate d _mc) -> [mixedAmountValue prices d amt | amt <- valuedbals1]
_ -> unvaluedbals --value-at=transaction was handled earlier
-- The total and average for the row, and their values. -- The total and average for the row, and their values.
, let rowtot = if balancetype_==PeriodChange then sum unvaluedbals else 0 -- Total for a cumulative/historical report is always zero.
, let rowavg = averageMixedAmounts unvaluedbals , let rowtot = if balancetype_==PeriodChange then sum valuedrowbals else 0
, let valuedrowtot = case value_ of , let rowavg = averageMixedAmounts valuedrowbals
Just (AtEnd _mc) -> mixedAmountValue prices reportlastday rowtot , empty_ || depth == 0 || any (not . isZeroMixedAmount) valuedrowbals
Just (AtNow _mc) -> mixedAmountValue prices today rowtot
Just (AtDate d _mc) -> mixedAmountValue prices d rowtot
_ -> rowtot
, let valuedrowavg = case value_ of
Just (AtEnd _mc) -> mixedAmountValue prices reportlastday rowavg
Just (AtNow _mc) -> mixedAmountValue prices today rowavg
Just (AtDate d _mc) -> mixedAmountValue prices d rowavg
_ -> rowavg
, empty_ || depth == 0 || any (not . isZeroMixedAmount) valuedbals
] ]
---------------------------------------------------------------------- ----------------------------------------------------------------------
@ -352,9 +292,9 @@ multiBalanceReport ropts@ReportOpts{..} q j@Journal{..} =
-- Sort the rows by amount or by account declaration order. This is a bit tricky. -- Sort the rows by amount or by account declaration order. This is a bit tricky.
-- TODO: is it always ok to sort report rows after report has been generated, as a separate step ? -- TODO: is it always ok to sort report rows after report has been generated, as a separate step ?
sortedrowsvalued :: [MultiBalanceReportRow] = sortedrows :: [MultiBalanceReportRow] =
dbg1 "sortedrowsvalued" $ dbg1 "sortedrows" $
sortrows rowsvalued sortrows rows
where where
sortrows sortrows
| sort_amount_ && accountlistmode_ == ALTree = sortTreeMBRByAmount | sort_amount_ && accountlistmode_ == ALTree = sortTreeMBRByAmount
@ -393,30 +333,19 @@ multiBalanceReport ropts@ReportOpts{..} q j@Journal{..} =
---------------------------------------------------------------------- ----------------------------------------------------------------------
-- 9. Build the report totals row. -- 9. Build the report totals row.
-- Calculate and maybe value the column totals. -- Calculate the column totals. These are always the sum of column amounts.
highestlevelaccts = [a | a <- displayaccts, not $ any (`elem` displayaccts) $ init $ expandAccountName a] highestlevelaccts = [a | a <- displayaccts, not $ any (`elem` displayaccts) $ init $ expandAccountName a]
colamts = transpose [bs | (a,_,_,bs,_,_) <- rows , not (tree_ ropts) || a `elem` highestlevelaccts] colamts = transpose [bs | (a,_,_,bs,_,_) <- rows, not (tree_ ropts) || a `elem` highestlevelaccts]
colamtsvalued = transpose [bs | (a,_,_,bs,_,_) <- rowsvalued, not (tree_ ropts) || a `elem` highestlevelaccts]
coltotals :: [MixedAmount] = coltotals :: [MixedAmount] =
dbg1 "coltotals" $ dbg1 "coltotals" $ map sum colamts
case value_ of -- Calculate the grand total and average. These are always the sum/average
Nothing -> map sum colamts -- of the column totals.
Just (AtCost _mc) -> map sum colamtsvalued
Just (AtEnd _mc) -> map (\(amts,periodlastday) -> maybevalue periodlastday $ sum amts) $ zip colamts lastdays
Just (AtNow _mc) -> map (maybevalue today . sum) colamts
Just (AtDate d _mc) -> map (maybevalue d . sum) colamts
-- Calculate and maybe value the grand total and average.
[grandtotal,grandaverage] = [grandtotal,grandaverage] =
let amts = map ($ map sum colamts) let amts = map ($ map sum colamts)
[if balancetype_==PeriodChange then sum else const 0 [if balancetype_==PeriodChange then sum else const 0
,averageMixedAmounts ,averageMixedAmounts
] ]
in case value_ of in amts
Nothing -> amts
Just (AtCost _mc) -> amts
Just (AtEnd _mc) -> map (maybevalue reportlastday) amts
Just (AtNow _mc) -> map (maybevalue today) amts
Just (AtDate d _mc) -> map (maybevalue d) amts
-- Totals row. -- Totals row.
totalsrow :: MultiBalanceReportTotals = totalsrow :: MultiBalanceReportTotals =
dbg1 "totalsrow" (coltotals, grandtotal, grandaverage) dbg1 "totalsrow" (coltotals, grandtotal, grandaverage)

2
hledger/Hledger/Cli/Commands/Balance.hs
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@ -583,7 +583,7 @@ multiBalanceReportAsText ropts@ReportOpts{..} r =
HistoricalBalance -> "Ending balances (historical)") HistoricalBalance -> "Ending balances (historical)")
(showDateSpan $ multiBalanceReportSpan r) (showDateSpan $ multiBalanceReportSpan r)
(case value_ of (case value_ of
Just (AtCost _mc) -> ", valued at transaction dates" Just (AtCost _mc) -> ", valued at cost"
Just (AtEnd _mc) -> ", valued at period ends" Just (AtEnd _mc) -> ", valued at period ends"
Just (AtNow _mc) -> ", current value" Just (AtNow _mc) -> ", current value"
Just (AtDate d _mc) -> ", valued at "++showDate d Just (AtDate d _mc) -> ", valued at "++showDate d

2
hledger/Hledger/Cli/CompoundBalanceCommand.hs
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@ -141,7 +141,7 @@ compoundBalanceCommand CompoundBalanceCommandSpec{..} opts@CliOpts{reportopts_=r
CumulativeChange -> "(Cumulative Ending Balances)" CumulativeChange -> "(Cumulative Ending Balances)"
HistoricalBalance -> "(Historical Ending Balances)" HistoricalBalance -> "(Historical Ending Balances)"
valuation = case value_ of valuation = case value_ of
Just (AtCost _mc) -> ", valued at transaction dates" Just (AtCost _mc) -> ", valued at cost"
Just (AtEnd _mc) -> ", valued at period ends" Just (AtEnd _mc) -> ", valued at period ends"
Just (AtNow _mc) -> ", current value" Just (AtNow _mc) -> ", current value"
Just (AtDate d _mc) -> ", valued at "++showDate d Just (AtDate d _mc) -> ", valued at "++showDate d