BILS Cash-Secured Put Strategy

BILS (State Street SPDR Bloomberg 3-12 Month T-Bill ETF), in the Financial Services sector, (Asset Management - Bonds industry), listed on AMEX.

This State Street SPDR ETF aims to mirror the investment performance, encompassing both price changes and yield, of the Bloomberg 3-12 Month U.S. Treasury Bill Index, before accounting for fees and expenses. The fund primarily invests in publicly issued U.S. Treasury Bills that have between three and twelve months remaining until their maturity date. By concentrating on short-duration fixed income, this offering is typically less sensitive to fluctuations in interest rates when compared to securities with longer durations. The portfolio undergoes rebalancing on the final business day of each month.

BILS (State Street SPDR Bloomberg 3-12 Month T-Bill ETF) trades in the Financial Services sector, specifically Asset Management - Bonds, with a market capitalization of approximately $3.86B, a beta of 0.02 versus the broader market, a 52-week range of 99.08-99.52, average daily share volume of 331K, a public-listing history dating back to 2020. These structural characteristics shape how BILS etf options price implied volatility around earnings windows, capital events, and macro-driven sector rotations.

A beta of 0.02 indicates BILS has historically moved less than the broader market, dampening realized volatility and producing tighter expected-move bands per unit of dollar exposure. BILS pays a dividend, which adjusts put-call parity and shifts the ex-dividend pricing across the listed chain.

What is a cash-secured put on BILS?

A cash-secured put sells an out-of-the-money put while holding cash equal to the strike-times-100 obligation, keeping the premium when the underlying stays above the strike.

BILS snapshot

As of August 14, 2026, spot at $99.31, ATM IV 24.20%, IV rank 50.26%, expected move 6.94%. The cash-secured put on BILS below is built from the end-of-day chain, with strikes snapped to listed contracts and premiums pulled from the bid/ask midpoint at a 35-day expiry.

Why this cash-secured put structure on BILS specifically: BILS IV at 24.20% is mid-range versus its 1-year history, so the credit collected on a BILS cash-secured put sits in line with its long-run distribution, with a market-implied 1-standard-deviation move of approximately 6.94% (roughly $6.89 on the underlying). The 35-day window matched to the front-month expiry keeps theta exposure bounded while still capturing the post-snapshot move; longer-dated BILS expiries trade a higher absolute premium for lower per-day decay. Position sizing on BILS should anchor to the underlying notional of $99.31 per share and to the trader's directional view on BILS etf.

BILS cash-secured put setup

The BILS cash-secured put below is built from the end-of-day chain, with each option leg priced at the bid/ask midpoint of its listed strike. With BILS at $99.31 on that close, the first option leg uses a $94.34 strike; additional legs (when the strategy has them) anchor to spot-relative offsets. Premiums come from the bid/ask midpoint on the listed BILS chain at a 35-day expiry; the cross-strike IV skew is reflected directly in the per-leg values rather than approximated. Quantity sizing assumes one contract per option leg (or 100 BILS shares for the stock leg in covered calls and collars).

ActionTypeStrike / BasisPremium (est)
Sell 1Put$94.34N/A

BILS cash-secured put risk and reward

Net Premium / Debit
N/A
Max Profit (per contract)
Unbounded
Max Loss (per contract)
Unbounded
Breakeven(s)
None on modeled curve
Risk / Reward Ratio
N/A

Max profit equals premium times 100; max loss equals strike minus premium times 100 (at zero, assuming assignment). Breakeven is strike minus premium.

BILS cash-secured put payoff curve

Modeled P&L at expiration across a range of underlying prices for the cash-secured put on BILS. Each row is one sampled price point from the computed payoff curve; the full curve uses 200 price points internally before being summarized into 10 rows here.

When traders use cash-secured put on BILS

Cash-secured puts on BILS earn premium while a trader waits to acquire BILS etf at a target strike below the current quote; most attractive when IV is rich and the trader is comfortable owning BILS.

BILS thesis for this cash-secured put

The market-implied 1-standard-deviation range for BILS extends from approximately $92.42 on the downside to $106.20 on the upside. A BILS cash-secured put lets a trader earn premium while waiting to acquire BILS at the strike price; the strategy is most attractive when the trader is comfortable holding the underlying at that level and IV is rich enough to compensate for the assignment risk. Current BILS IV rank near 50.26% is mid-range against its 1-year distribution, so the IV signal is neutral; the cash-secured put thesis on BILS should anchor more to the directional view and the expected-move geometry. As a Financial Services name, BILS options can move on sector-level news flow (peer earnings, regulatory updates, industry-specific macro data) in addition to BILS-specific events.

BILS cash-secured put positions are structurally neutral to slightly bullish; the modeled P&L assumes European-style exercise at expiration and ignores early assignment, transaction costs, dividends paid before expiry on the stock leg (when present), and the bid-ask spread on the listed chain. BILS positions also carry Financial Services sector concentration risk; news flow inside the sector (peer earnings, regulatory shifts, supply-chain headlines) can move BILS alongside the broader basket even when BILS-specific fundamentals are unchanged. Short-premium structures like a cash-secured put on BILS carry tail risk when realized volatility exceeds the implied move; review historical BILS earnings reactions and macro stress periods before sizing. Always rebuild the position from current BILS chain quotes before placing a trade.

Frequently asked questions

What is a cash-secured put on BILS?
A cash-secured put on BILS is the cash-secured put strategy applied to BILS (etf). The strategy is structurally neutral to slightly bullish: A cash-secured put sells an out-of-the-money put while holding cash equal to the strike-times-100 obligation, keeping the premium when the underlying stays above the strike. With BILS etf at $99.31 on the most recent close, the strikes shown on this page are snapped to the nearest listed BILS chain strike and the premiums come straight from that session's bid/ask midpoint.
How are BILS cash-secured put max profit and max loss calculated?
Max profit equals premium times 100; max loss equals strike minus premium times 100 (at zero, assuming assignment). Breakeven is strike minus premium. For the BILS cash-secured put priced from the end-of-day chain at a 30-day expiry (ATM IV 24.20%), the computed maximum profit is unbounded per contract and the computed maximum loss is unbounded per contract. Live intraday quotes will differ as the chain moves through the trading session.
What is the breakeven for a BILS cash-secured put?
The breakeven for the BILS cash-secured put priced on this page is no defined breakeven on the modeled curve at expiration, derived from the end-of-day chain's premiums. Breakeven is the underlying price at which the strategy's P&L crosses zero ignoring transaction costs and assignment risk. The BILS market-implied 1-standard-deviation expected move in the same options snapshot is approximately 6.94%; if the move sits well outside the breakeven distance, the structure's risk-reward becomes correspondingly tighter.
When should you consider a cash-secured put on BILS?
Cash-secured puts on BILS earn premium while a trader waits to acquire BILS etf at a target strike below the current quote; most attractive when IV is rich and the trader is comfortable owning BILS.
How does current BILS implied volatility affect this cash-secured put?
BILS ATM IV is at 24.20% with IV rank near 50.26%, which is mid-range against its 1-year history. Strategy selection depends more on directional thesis and expected move than on a strong IV signal.

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