WDC, Oct 2, 2026 · Trading desk

Paper trading, not investment advice. Every account and book on these pages trades paper money: the Alpaca paper accounts DAILY ($1,000,000 from Sep 30, 2026), INTRA1 ($100,000 from Sep 30, 2026) and INTRA2 ($100,000 from Sep 30, 2026); the simulated books SIM-TT ($100,000 from Sep 29, 2026), SIM-V2B ($100,000 from Sep 28, 2026) and SIM-V2B-TOM ($100,000 from Sep 28, 2026), filled at the official close; and market-analysis's ledgers, one contract per position against a $100,000 reporting equity. No real money is at stake. Positions, trades and P&L are published the same day, as the engines record them, with each number's source and cost model labelled. Nothing here is a recommendation to buy, sell or hold any security, and nothing is tailored to you. Each strategy is a pre-registered experiment, read once on a date or at a trade count fixed in advance; until then its record says little either way. I may hold or have held positions in securities shown here. Markets can and do lose money.

Account: MA
Strategy: S-C C1 iron butterfly, exploration
Book: exploration
Symbol: WDC
Asset class: option structure
Side: short
Exposure: neutral
Status: open
Opened: Oct 2, 2026
Closed: —
Quantity: 1
Entry price: 59.603544
Exit price: —
Exit by: —
Book value at entry: —

Record GitHub ledger

Cost model

half of each leg's spread plus $0.65 a contract at entry, the spread quoted from 15:00 to 16:00 ET or, for a wing priced by model, the stock's median option spread over the 20 sessions before, at least 5%; nothing at expiry

Role	Date	At (ET)	Side	Qty	Asked	Price	Rule's price	Close	Slippage	Against the close	How	Why	The rule's numbers
entry	Oct 2, 2026	—	sell	1	—	59.603544	—	—	—	—	late window	F3	4 trigger numbers rank null verdict F3 cap_pass true cap_reason null 13 numbers k 415 k_dn 260 k_up 570 close 415.29 iv30d 0.671771636967211 sector Technology dte_cal 28 marketcap 166771819057 sigma_hold 77.26907628625611 mean_spread 0.10682965294117647 model_entry true entry_cost_usd 524.0711650294395 entry_tier_max 3

Contract	Right	Strike	Expiry	Side	Qty	Entry	Exit	Facts
WDC261030C00415000	call	415.00	Oct 30, 2026	short	1	32.049412	—	4 numbers exit_tier null entry_tier 1 entry_source print_vwap entry_spread 0.08755670588235294
WDC261030P00415000	put	415.00	Oct 30, 2026	short	1	30.054	—	4 numbers exit_tier null entry_tier 1 entry_source print_vwap entry_spread 0.1261026
WDC261030C00570000	call	570.00	Oct 30, 2026	long	1	2.39	—	4 numbers exit_tier null entry_tier 2 entry_source print_nbbo entry_spread 1.598326359832636
WDC261030P00260000	put	260.00	Oct 30, 2026	long	1	0.109868	—	4 numbers exit_tier null entry_tier 3 entry_source model entry_spread 0.12191750000000001

variant: C1
risk_usd: 9539.645630676881
graded_at: null
policy_id: sc-1.0
structure: IB
max_loss_usd: 9539.645630676881
stress_loss_usd: null

WDC · S-C C1 iron butterfly, exploration

The trade

Entry and exit

Legs

Notes