Variable prepaid forwards: cash today, gain deferred

A variable prepaid forward is what wealth managers usually reach for when a holder needs liquidity from a concentrated position but cannot — for tax, regulatory, or signalling reasons — sell outright. The structure pledges shares against a forward delivery years out, hands the holder roughly 80% of spot in cash today, and defers the capital-gains event to settlement. Done inside the §1259 safe harbour, the IRS doesn't treat it as a constructive sale. Done outside the safe harbour, it does. This post is about how the optimizer picks the structure and why the collar width is the load-bearing parameter.

Three constraints typically apply to the holder this strategy serves: they want a meaningful slug of cash today (more than a rolling options program would generate); they cannot or will not realise the embedded gain on the position right now; and they don't want exposure to a margin call if the stock falls. The VPF satisfies all three. The bank takes the position as collateral, hands the holder cash, and waits for the agreed settlement date. At settlement the holder delivers a variable share count — fewer if the stock is up, more if it's down, bounded by a collar.

The economics of a VPF are not "selling stock with a tax dodge." They are "borrowing against stock without a margin call, repaying in shares, and accepting that the embedded gain crystallises on a date you choose, not the bank's."

max   PV(C; r, T)
 P_floor, P_cap, T

s.t.   collar(P_floor, P_cap)  ⊂  §1259-safe-harbour band
       T  ∈  [1y, 10y]
       counterparty PV pricing curve C(F, P_floor, P_cap, T)
       holder constraints: liquidity_need_today, max_share_dilution_at_T

§1259 was enacted in 1997 to stop holders monetising appreciated stock through forward sales without recognising the gain. It treats certain forward-delivery contracts as "constructive sales" that crystallise the gain immediately. The statute is broad; Treasury never published bright-line thresholds. In practice, structures with a sufficiently wide collar — typically a put floor at ~80% of spot and a call cap at ~120% — are treated by major bank desks as outside §1259's reach, citing IRS Rev. Rul. 2003-7 and the absence of adverse litigation outcomes against well-collared VPFs.

The optimizer's inputs are a counterparty pricing curve (typically a function of underlying volatility, dividend yield, risk-free rate, and the bank's hedging cost), the holder's position size and basis, the holder's liquidity need today, and the holder's tenor preference. The output is a triple of (collar bands, tenor, cash advance) that maximises present value of cash subject to the constraints.

At settlement, three cases:

• Counterparty risk. The bank holds the stock as collateral. In a counterparty insolvency, recovery depends on the prime brokerage agreement. The optimizer doesn't price counterparty default; it assumes a creditworthy investment-bank counterparty.
• Voting rights. Some structures transfer voting; some do not. For founder-held shares with governance implications, this needs to be negotiated separately.
• Mark-to-market disclosure. Public-company insiders may face reporting obligations on structured derivatives. Coordinate with corporate counsel.

For the alternative concentrated-position strategy that monetises through periodic premium rather than a lump-sum forward, see the options overlay deep-dive.

Educational illustration · structured-product material is deal-specific. Nothing here is investment, tax, or legal advice.