IOSG: In-depth Research on MSTR STRC, the BTC Financing Flywheel Behind the 11.5% Yield

STRC is a sophisticated financing tool, and its flywheel logic is currently running on one leg. (Context: Michael Saylor at Bitcoin 2026: In 9 months, STRC became the world's largest preferred stock, with a Sharpe ratio outperforming Nvidia) (Background: Strategy swept 3,468 BTC in a single day! STRC "money printing for BTC" is firing on all cylinders, with total holdings approaching 770,000 BTC) Core View STRC is a sophisticated financing tool that converts fixed-income demand into buying pressure for BTC. In a bull market, it offers an 11.5% floating yield with low price volatility, but its risk structure is essentially equivalent to "selling a put option" on the BTC asset coverage. Therefore, when BTC falls, it cannot replace true fixed-income products. The real vulnerability of STRC is not the BTC price, but the mNAV. Once MSTR's mNAV falls below 1.0x for more than 4 consecutive weeks, the flywheel will enter a passive downward spiral within 3 months. We estimate the probability of this trigger occurring in the second half of 2026 is about 70%, at which point STRC will present a buyable entry point at $85 – $90. If the trigger is not pulled, it means Saylor has successfully created a brand-new category of BTC-native credit instruments. Strategy (formerly MicroStrategy) launched STRC ("Stretch"), a perpetual preferred stock with a target par value of $100, maintaining price stability through monthly floating dividends. As of March 31, 2026, STRC has a nominal size of $5B, with peak daily trading volume exceeding $300M (as of March 2026 data). Since its launch, it has provided over $3.5B in BTC purchasing funds for Strategy, making it their most important financing vehicle. As of April 12, 2026, Strategy holds 780,897 BTC on its balance sheet, with a leverage ratio of 33% and approximately $21.6B in remaining STRC ATM issuance capacity. · This tool occupies a novel category: it looks like a money market fund (stable price, high yield), but the credit risk assumed comes entirely from a single company's BTC holdings. Before laying out the arguments, let's clarify "where we might be wrong." If our analysis is wrong, it will be because: traditional fixed-income allocators are truly willing to accept reflexive risk for a 700bps spread; STRC scales to $50B within 3 years, becoming the de facto BTC yield curve; Saylor successfully securitizes BTC into an interest-bearing collateral asset acceptable to institutional portfolios. This result would represent the largest integration of crypto into traditional finance to date—a new asset class of $50B+ that did not exist before 2025. · In this optimistic scenario, the dividend pause in April 2026 is not a warning signal, but a feature: a mature tool beginning to stabilize yields after initial price discovery, similar to the process where early high-yield bond ETFs gradually reprice downward following institutional adoption. The core innovation of STRC: It converts yield-seeking capital into buying pressure for BTC. When STRC trades near $100, Saylor issues new shares via ATM (accounting for about 40% of daily volume), uses the proceeds to buy BTC, and completes deleveraging by issuing MSTR common stock at a price higher than NAV (mNAV > 1x). The end result is: $100M in STRC daily trading volume can leverage approximately $120M in BTC purchases. However, the fragility of this mechanism lies in its underlying circularity: STRC stays stable at $100 because investors believe it will stay stable; and Saylor maintains this belief by continuously raising dividends. This anchor is not supported by collateral, but by confidence, maintained by a continuous dividend auction with no formal cap. Once this confidence breaks, the auction becomes increasingly expensive. Key Insight: For Strategy, STRC converts fixed-income demand into fuel for BTC accumulation. For investors, it offers optimized Sharpe ratio returns in a benign environment, but hides a BTC "short put." NYDIG's description is precise: "It is similar to shorting a put option on BTC asset coverage—trading yield for the downside risk of BTC declines eroding the asset buffer." The key question is: Will STRC enter a self-reinforcing downward spiral? The answer is yes, but only if specific conditions are met. This mechanism has three interconnected failure paths. Phase 1: BTC decline breaks the $10