California Water Service Group (CWT) Options History
Historical options analytics archive for CWT with monthly max pain, implied volatility, gamma exposure, and put/call data.
209 months of complete options data available.
CWT monthly aggregates
Month-by-month rollups derived from the daily snapshot archive for CWT. Volatility and put/call columns are averages across trading days within the month; max pain, net GEX, and net DEX are the end-of-month values (last trading day of the month).
| Month | Days | Avg ATM IV | Avg IV Rank | End Max Pain | End Net GEX | End Net DEX | Avg P/C |
|---|---|---|---|---|---|---|---|
| 2026-06 | 21 | 23.6% | 11.0% | $45.00 | $4.3K | -$306.0K | 1.01 |
| 2026-05 | 20 | 23.0% | 10.3% | $35.00 | $1.5K | -$120.2K | 0.36 |
| 2026-04 | 21 | 53.3% | 29.2% | $45.00 | $978 | -$52.7K | 1.09 |
| 2026-03 | 22 | 55.2% | 30.2% | $40.00 | $3.5K | -$171.2K | 2.12 |
| 2026-02 | 19 | 47.4% | 24.4% | $40.00 | $169.6K | -$3.0M | 2.77 |
| 2026-01 | 20 | 64.2% | 36.9% | $45.00 | $185.6K | -$2.7M | 0.08 |
This archive aggregates CWT's daily end-of-day options snapshots into monthly summaries, spanning 2009-02 through 2026-06. Each month rolls up the underlying snapshot archive, which provides continuous end-of-day coverage from 2007 to present: implied-volatility levels, IV rank, and the put/call ratio are time-averaged across the month; total call and put volume are summed; and dealer positioning (net gamma and delta exposure) and the max-pain strike are taken at the month's final trading day. The result is a long-horizon view of how CWT option pricing, volatility regime, and dealer hedging pressure evolved month over month, useful for backtesting strategy assumptions and for studying volatility-regime shifts around earnings and macro events. The most recent aggregated month (2026-06) shows an average ATM implied volatility near 23.6%, a month-end max-pain strike around $45.00, an average put/call ratio of 1.01.
2026
Jan | Feb | Mar | Apr | May | Jun
2025
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2024
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2023
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2022
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2021
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2020
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2019
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2018
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2017
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2016
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2015
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2014
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2013
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2012
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2011
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2010
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2009
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Frequently asked CWT history questions
- How much options history is available for CWT?
- This archive holds 209 months of CWT options analytics, spanning 2009-02 through 2026-06. Each entry is a monthly rollup of CWT's daily end-of-day options snapshot record, which provides continuous coverage from 2007 to present. Use the year-grouped links on this page to jump to any specific month within the CWT archive.
- What data does each monthly CWT aggregate contain?
- Every monthly row summarizes that month of CWT option activity: time-averaged ATM implied volatility and IV rank, the month-end max-pain strike, end-of-month net dealer gamma (GEX) and delta (DEX) exposure, the average put/call ratio, and total call and put volume. For example, 2026-06 recorded an average ATM implied volatility near 23.6%, an average IV rank of 11.0%, a month-end max-pain strike around $45.00, an average put/call ratio of 1.01.
- How is the CWT options-history archive built and how often does it update?
- The archive is derived from CWT's daily end-of-day options snapshots, which capture spot, the full listed chain, implied volatility, and dealer-positioning exposures each trading day. Those daily records are rolled up into the monthly summaries shown here and refreshed as new end-of-day data lands. Traders use the long-horizon view to backtest strategy assumptions, study how CWT's volatility regime shifts around earnings and macro events, and compare current dealer positioning against historical norms.