Five business days after the July 4, 2026 begin-construction deadline, the market is holding the Wednesday split. The tax-credit insurance market is still quoting a 65 to 110 basis point pathway gradient on late-week cost-incurred paper. Two of the three most active transferability primary desks are still quoting a 25 to 35 basis point split between physical-work and cost-incurred paper. The tax-equity primary market is still holding a single-price convention through Thursday close. No desk moved on Thursday. The specific empirical question the Q3 2026 origination cycle now has to answer is dated, and the three dates that answer it are on the calendar between July 20 and October 15.
What Thursday did not change
Thursday closed with the same three-tier structure Wednesday afternoon left in place. Insurance is the widest, transferability is partially split, and tax-equity primary is flat. The specialty carriers held their Wednesday morning premium sheets through Thursday close without further widening on the late-week EPA cohort. The two transferability desks quoting a two-tier price held the 25 to 35 basis point split. The third transferability desk held the single-price convention. Volumes on the two-tier desks stepped up 15 to 25 percent versus Wednesday, which is the specific number the buy side has been routing to the price it prefers rather than the price the desk prefers.
The tax-equity primary desk did not open new paper on Thursday. The Q3 2026 origination cycle sits on the calendar rather than on the tape. That is the specific structural reason the tax-equity primary market is not repricing through Thursday: there is no primary paper to reprice. Secondary trading on already-syndicated Q2 2026 cost-incurred paper was thin on Thursday and did not move materially from the Tuesday marks two funds set at 15 to 25 basis points below par.
The first dated watchpoint: the first Q3 tax-equity primary syndication
The first Q3 2026 tax-equity primary syndication is currently tracking to the third or fourth week of July. That syndication is the specific pricing event that resolves whether the pathway gradient the insurance market and the transferability desks are quoting prices into the tax-equity primary market or whether tax-equity primary continues to hold a pathway-neutral convention through Q3.
The two clean outcomes are visible now. If the first syndication prices on a two-tier convention consistent with the transferability desk, the gradient closes across the tax-equity primary book in one to two additional syndications and the Q3 origination cycle settles into a two-tier convention by early August. Placement risk on late-week EPAs stays inside the insurance-plus-transferability spread. Developers with clean paid-at-execution paper get a specific pricing advantage that shows up in the first syndication and holds through Q3.
If the first syndication prices on a single-price convention, the transferability-versus-tax-equity spread opens further. The buy side keeps routing late-week paper to the two-tier desks. The single-price tax-equity primary desk becomes the specific anchor that lets developers with late-week cost-incurred paper price into the primary market at pathway-neutral rates while the transferability market keeps pricing a gradient. That outcome is more favorable to late-week developers and materially less favorable to the audit-defensibility story the insurance carriers are pricing.
The second dated watchpoint: the September Treasury guidance window
Treasury has indicated through professional-services channels that it is targeting September for the next round of guidance on two specific questions inside the post-vacatur cost-incurred pathway. The first is the related-party pricing-standard question that has been sitting under Notice 2018-59 since the June 6 vacatur of Notice 2025-42. The second is the 3.5-month payment mechanics on deposit obligations executed under a post-vacatur EPA. Both questions are load-bearing for the 73 GWdc cost-incurred pool the July 7 note framed as the specific pathway carrying interpretive risk into the 2029 to 2032 IRS examination cycle.
Guidance landing in September compresses the interpretive-risk floor on the 73 GWdc pool by the end of Q3. That specific outcome would let the insurance carriers reprice their premium sheets tighter into Q4, and it would resolve the audit-defensibility question the insurance carriers are pricing on the wide side today. Guidance slipping to Q4 widens the floor through year-end. That outcome keeps the insurance premium sheet wide through the Q3 origination cycle and forces the tax-equity primary market into a repricing conversation late in Q3 rather than at the front of it.
The specific date to watch inside the September window is the first Treasury information release on related-party pricing-standard mechanics under the post-vacatur framework. Treasury releases in September have historically clustered in the second and third weeks. That is the operational window the primary desks are keying their Q4 pipeline planning around.
The third dated watchpoint: the first stress event inside the 285-day payment-deferred window
The 285-day payment-deferred window opened July 5, one day after the deadline. Q3 will run 82 days of that window. Any specific stress event inside those 82 days would put a specific cohort of 4 to 7 GWdc of late-week cost-incurred paper under simultaneous specific-performance review before the September Treasury window closes.
Three specific stress-event categories are on the watchlist. A module supplier bankruptcy filing inside the 285-day window would surface the supplier-continuity representation the insurance carriers wrote into the Wednesday quote sheets, and it would test whether developers holding a 3.5-month payment-deferred deposit structure can name an alternate-supplier standby without opening the deposit ratio for post-closing adjustment. A tracker supplier receivership would raise the same question against a different equipment cohort, with tracker supply concentrated across a shorter list of vendors. A developer-side refinancing failure on a portfolio holding late-week EPAs would test the facility-cost audit rider that the insurance carriers are pricing on the 5 to 20 basis point deposit-ratio band closest to the 5-percent floor.
Base case through July 31 is that no specific event lands in the first 27 days of the window. That base case can hold or break inside the specific August calendar. The August watchlist is short and specific, and it starts with the two module suppliers that reported Q2 receivables aging outside the 90-day band in their May 15 filings.
The compressed Q3 calendar
The Q3 2026 origination calendar now sits inside three dated brackets. The first tax-equity primary syndication in the third or fourth week of July prices the pathway question the market has been quoting since Wednesday. The September Treasury guidance window resolves the interpretive-risk floor. The 82-day 285-day payment-deferred window overlays the whole quarter and can force a cohort-specific stress event onto the calendar at any point inside it. Every other input on the Q3 calendar sits underneath those three dates.
Sources and framing
This note extends the July 3, July 7, and July 8 CPP framework on the July 4 begin-construction deadline. Market observations reflect professional-services channel color across specialty tax-credit insurance carriers, transferability primary desks, and tax-equity fund managers through Thursday close July 9, 2026. Specific quotes are indicative and cohort-conditional, not screen-tradeable prints. For the framework on the 228 GWdc announced solar safe-harbor pool and the 73 GWdc cost-incurred pathway split, see the July 7 post on the first business-day read after the deadline. For the Wednesday market observations on the transferability desk split and the specialty carrier widening, see the July 8 midweek note.