Examine how the Centre's market borrowing calendar and debt-management tools (switches, buybacks, long tenors) help manage rollover risk.

Rollover risk is the danger that too many securities mature in one year, forcing the government to refinance a large sum at whatever rate then prevails. The H2 FY 2026-27 calendar of ₹7,86,000 crore [1] illustrates how India contains this risk — though it cannot eliminate it.

The calendar spreads issuance and builds predictability

• Announced half-yearly since 2002-03, with auctions conducted by the RBI as debt manager [2] — a published schedule prevents lumpy, opportunistic issuance.
• H2 FY27 borrowing is spread across 23 weekly auctions over 8 tenors (3–50 years) [1].
• A greenshoe of up to ₹2,000 crore per security absorbs over-subscription without unscheduled auctions [1].
• Short-term mismatches are pushed to T-Bills and Ways and Means Advances (₹50,000 crore) [1], so cash needs do not distort the dated-securities profile.

Long tenors and switches/buybacks reshape the redemption profile

• 40- and 50-year paper is 18.8% of H2 borrowing, while the 10-year keeps benchmark liquidity at 26.3% [1] — repayments are pushed decades out.
• Switches and buybacks retire near-maturity stock in exchange for longer paper, directly smoothening redemptions [1]; partly through these, full-year borrowing is expected at ₹15,99,506 crore against a BE of ₹17,20,000 crore [1].

But the tools trade one risk for another

• The RBI's twin aims — minimising cost and reducing rollover risk — pull in opposite directions [4]; investors demand a term premium for 50-year lending, so safety is bought at higher coupons locked in for decades.
• Cost remains market-determined: the weighted average cost fell to a 17-year low of 5.79% in 2020-21 despite net borrowing rising 141.2% [4].
• The calendar decides when and in which tenor, not how much — with liabilities at 55.6% of GDP and interest absorbing 40% of revenue receipts [3], the quantum is a fiscal question.

Thus the calendar and its tools are sound instruments of maturity management, converting a bunched, uncertain redemption burden into a predictable one. Sustained consolidation towards the 50%-of-GDP liability target by March 2031 [3], combined with deeper investor participation, would let India retain this stability at lower cost.