-- list around-the-money calls:
SELECT 
  s.symbol, 
  s.close,
  o.strike,
  o.delta,
  o.bid,
  o.ask
FROM
  stock_quote AS s
INNER JOIN
  option_quote AS o
  ON o.underlying = s.symbol
WHERE
  abs(o.strike-s.close)/s.close < 0.07
  AND
  o.type = 'call'
LIMIT 30;

-- historical payoff of at-the-money calendars:
SELECT
  s.quote_date,
  s.symbol,
  s.close,
  front_month.strike AS strike,
  front_month.type AS "type",
  front_month.expiration AS front_month_exp,
  back_month.expiration AS back_month_exp,
  (back_month.ask-front_month.bid) AS cost,
  (back_month_at_exp.bid-cost) AS payout
FROM 
  stock_quote AS s
INNER JOIN
  option_quote AS front_month
  ON 
    front_month.underlying = s.symbol
    AND
    front_month.quote_date = s.quote_date
    AND
    front_month.expiration > s.quote_date
INNER JOIN
  option_quote AS back_month
  ON 
    back_month.underlying = s.symbol
    AND
    back_month.quote_date = front_month.quote_date
    AND
    back_month.strike = front_month.strike
    AND
    back_month.type = front_month.type
    AND
    back_month.expiration > front_month.expiration
INNER JOIN
  option_quote AS back_month_at_exp
  ON 
    back_month_at_exp.underlying = s.symbol
    AND
    back_month_at_exp.strike = back_month.strike
    AND
    back_month_at_exp.type = back_month.type
    AND
    back_month_at_exp.expiration = back_month.expiration
    AND
    back_month_at_exp.quote_date = front_month.expiration
WHERE
  s.symbol = 'MSFT'
ORDER BY
  s.quote_date,
  s.symbol,
  strike,
  "type"
LIMIT 30;

-- given an underlying, contract type, strike, and front/back expirations: for each quote_date, list prices of calendars:
SELECT
  "front_contract"."quote_date",
  ("back_contract"."ask" - "front_contract"."bid") AS "price"
FROM
  "option_quote" AS "front_contract"
INNER JOIN
  "option_quote" AS "back_contract"
  ON
        "back_contract"."underlying" = "front_contract"."underlying"
    AND "back_contract"."type" = "front_contract"."type"
    AND "back_contract"."quote_date" = "front_contract"."quote_date"
    AND "back_contract"."strike" = "front_contract"."strike"
    AND "back_contract"."expiration" = '?'
WHERE
      "front_contract"."underlying" = '?'
  AND "front_contract"."type" = 'call'
  AND "front_contract"."strike" = '?'
  AND "front_contract"."expiration" = '?'