Examine how instruments such as optionally convertible debt under the RDI Fund can bridge the 'valley of death' for strategic deep-tech enterprises in India.

The 'valley of death' is the funding gap between a prototype proven in the lab and a product that is deployed and earning revenue. The Technology Development Board (TDB) has given Astrome Technologies ₹64.05 crore of Optionally Convertible Debt (OCD). The money will take a sovereign AI-ELINT satellite constellation from TRL-4 to TRL-9 [1]. This shows how well-designed debt can bridge the gap, provided the risk of having no buyer is also addressed.

Why strategic deep-tech falls into the valley

• Long gestation, heavy capital: satellites, launchers and chips need years of spending before any revenue.
• Single buyer: defence-grade products like ELINT (electronic intelligence) are sold mainly to the state. This keeps venture capital away.
• Wrong instruments: grants are small and one-off, and bank loans demand collateral and early repayment.

How OCD bridges the gap

• Patient capital without early dilution: the founders keep control because the support is a loan. If the venture succeeds, the state can convert the loan into shares and share the gains [1].
• Repayable, not a grant: the RDI Scheme gives no grants [2], which enforces financial discipline.
• Shared risk: TDB funds about half of the project (₹64.05 crore of ₹128.11 crore) [1]. BigEndian's deal follows the same pattern (₹130 crore of ₹260 crore) [3]. The firms keep their own money at stake.
• Support across all stages of maturity: the funding runs from TRL-4 to TRL-9 [1]. Agnikul's ₹200 crore OCD backs a reusable launcher in the same way [4].

Lab prototype (TRL-4) ──[ Valley of death: no revenue, no VC ]──► Deployed system (TRL-9)
                            ▲ OCD bridge: patient debt → optional equity

Fig: OCD bridging the valley of death

Limitations

• Demand risk: a firm can reach TRL-9 and still have no buyer, and so no revenue to repay the loan. The release names no user agency [1].
• Opacity: the OCD conversion terms are not disclosed [1], which limits outside scrutiny.
• Integrity of selection: selection relies on experts disclosing conflicts and stepping aside from decisions. Only the government itself has confirmed this was followed [5].
• Unstable funding: the Parliamentary Standing Committee flagged a cut in the RDI allocation from ₹20,000 crore (BE) to ₹3,000 crore (RE) [6].
• Control: strategic assets must stay under government control [7], yet the release does not say who owns the satellites or the data.

Way forward

• Anchor procurement: the Ministry of Defence should commit to buying the output before launch.
• Transparency: TDB should publish the conversion terms and release money in tranches tied to milestones.
• Oversight: Parliament should periodically review RDI-funded strategic projects.

OCD thus turns what would otherwise be a one-time subsidy into patient risk capital that must be accounted for. Combined with an assured buyer and transparent governance, it can carry Indian deep-tech across the valley. That would advance Atmanirbhar Bharat and SDG 9 (industry, innovation and infrastructure).