WITH roe_table AS (
SELECT
symbol,
report_date,
MAX(CASE WHEN item_name = 'net_income_common_stockholders' THEN item_value END) AS net_income_common_stockholders,
MAX(CASE WHEN item_name = 'stockholders_equity' THEN item_value END) AS stockholders_equity
FROM
'{url}'
WHERE
symbol = '{ticker}'
AND item_name IN ('net_income_common_stockholders', 'stockholders_equity')
AND report_date != 'TTM'
AND period_type = 'quarterly'
AND finance_type in ('income_statement', 'balance_sheet')
GROUP BY symbol, report_date
),
base_data AS (
SELECT
symbol,
report_date,
net_income_common_stockholders,
stockholders_equity,
YEAR(report_date::DATE) AS report_year,
QUARTER(report_date::DATE) AS report_quarter,
YEAR(report_date::DATE) * 4 + QUARTER(report_date::DATE) AS continuous_id
FROM
roe_table
WHERE
net_income_common_stockholders IS NOT NULL AND stockholders_equity IS NOT NULL
),
base_data_rn AS (
SELECT
symbol,
report_date,
net_income_common_stockholders,
stockholders_equity,
report_year,
report_quarter,
continuous_id,
ROW_NUMBER() OVER (ORDER BY continuous_id ASC) AS rn_asc
FROM
base_data
),
grouped_data AS (
SELECT
*,
continuous_id - rn_asc AS group_id
FROM
base_data_rn
),
base_data_window AS (
SELECT
symbol,
report_date,
net_income_common_stockholders,
stockholders_equity,
ROW_NUMBER() OVER (ORDER BY report_date ASC) AS rn
FROM
grouped_data t1
JOIN (
SELECT
group_id
FROM
grouped_data
ORDER BY
continuous_id DESC
LIMIT 1
) t2
ON t1.group_id = t2.group_id
ORDER BY
continuous_id ASC
),
equity_with_lag AS (
SELECT
symbol,
report_date,
net_income_common_stockholders,
stockholders_equity as ending_stockholders_equity,
LAG(stockholders_equity, 1) OVER (PARTITION BY symbol ORDER BY report_date) AS beginning_stockholders_equity
FROM base_data_window
),
equity_avg AS (
SELECT
symbol,
report_date,
net_income_common_stockholders,
ending_stockholders_equity,
beginning_stockholders_equity,
(beginning_stockholders_equity + ending_stockholders_equity) / 2.0 AS avg_equity
FROM equity_with_lag
WHERE beginning_stockholders_equity IS NOT NULL
)
select symbol,
report_date,
net_income_common_stockholders,
beginning_stockholders_equity,
ending_stockholders_equity,
avg_equity,
ROUND(
CASE
WHEN net_income_common_stockholders < 0 OR avg_equity < 0 THEN
-ABS(net_income_common_stockholders / avg_equity)
ELSE
net_income_common_stockholders / avg_equity
END
, 4) AS roe
from equity_avg order by report_date;
