State Development Loans

Also called: SDL, State government securities · Topic: Financial Markets, Instruments, Insurance and Pensions · NCERT: Beyond NCERT

Meaning

State Development Loans (SDLs) are dated securities that state governments sell through RBI auctions to borrow money from the market. A dated security is a government bond with an original maturity of one year or more [2].

SDLs are the main way states borrow from the market. States spend a large share of public money, so the cost and amount of their borrowing matter for India's public finances and for its bond market.

Spread formula: SDL spread = yield on SDL − yield on a central G-sec of the same maturity

Explanation

How an SDL works

• The basic deal: an investor lends money to a state government. The state promises to pay interest and to return the money on a fixed date.
• The SDL is tradable. The holder can sell it to another investor before it matures.

• SDLs are part of the wider government securities (G-sec) family. A G-sec is a debt paper sold by the Centre or a state.

• States issue only dated securities. They do not issue Treasury Bills (T-bills) or Cash Management Bills (CMBs). T-bills and CMBs are for less than a year, and only the Centre issues them [2].

• Coupon (the fixed interest rate, calculated on the face value, usually ₹100) is paid half-yearly.
• Worked example: a ₹100 SDL with a 7.2% coupon pays ₹7.20 a year. That comes as ₹3.60 every six months.

How SDLs are sold and traded

• Primary market (new bonds): RBI holds auctions on behalf of the state.
• Primary dealers (PDs) are entities authorised by RBI. They may underwrite SDL auctions, just as they do central G-sec auctions [3]. Underwriting means promising to buy any part of the auction that other bidders do not take.

• Non-competitive bidding: small investors bid only for an amount, not a price. They get bonds at the average auction price [2].

• Secondary market (existing bonds): investors trade SDLs among themselves, for example on RBI's electronic platform NDS-OM (Negotiated Dealing System – Order Matching).

The spread: why SDLs pay more than central G-secs

• SDLs trade at a spread over central G-secs of the same maturity. The spread is the extra yield investors ask for.
• Worked example:
• A 10-year central G-sec yields 6.8%.
• A 10-year SDL yields 7.2%.

• Spread = 7.2 − 6.8 = 0.4 percentage points = 40 basis points (1 basis point = 0.01%).

• Why the spread exists:

• Credit view: investors see state finances as slightly riskier than the Centre's.
• Liquidity: SDLs are harder to sell quickly than central G-secs.

• So investors want a little more return to hold them.

• What makes the spread widen or narrow:

• Weak state finances (high debt or high deficits) → investors see more risk → the spread widens → borrowing costs the state more.
• More trading and more buyers → SDLs become easier to sell → the spread narrows.

Price and yield

• Bond price and yield move in opposite directions.
• Current yield = annual coupon ÷ market price × 100.

• When market interest rates rise, the prices of old SDLs fall, so their yields rise.

• Mark-to-market loss: when RBI raises rates, banks that hold many SDLs see the value of those bonds fall.

In India

• Law: the Government Securities Act 2006 governs how G-secs, including SDLs, are issued, transferred and held.
• Constitution: Article 293. If a state still owes money to the Centre, it needs the Centre's consent to borrow. This lets the Centre shape how much states borrow in the market.
• Debt manager: RBI.
• RBI manages the Centre's debt by statute (the RBI Act 1934).

• RBI manages each state's debt by agreement with that state. This is a common exam point.

• Primary dealers (started in 1995-96) underwrite auctions of both central G-secs and SDLs [3].

• Foreign investors: under the medium-term framework, the FPI (foreign portfolio investor) limit is 2% of outstanding SDLs, compared with 6% of outstanding central G-secs [1].
• Banks as captive buyers: under the SLR (Statutory Liquidity Ratio), banks must keep a set share of their deposits in liquid assets, mostly G-secs. This creates steady demand for state bonds as well as central ones.

Don't confuse with

• Central government dated securities: both are long-term G-secs. But the Centre's debt is managed by RBI by statute, while state debt is managed by agreement. SDLs also usually yield a spread above central G-secs.
• Treasury Bills (T-bills) and Cash Management Bills (CMBs): these are short-term papers of less than a year, and only the Centre issues them. States issue only dated securities [2].
• Sovereign Gold Bonds (SGBs): these are central G-secs measured in grams of gold, sold to cut gold imports. SDLs are ordinary rupee borrowings by states.
• Oil bonds: these were non-cash central securities given to oil marketing companies in 2005-10. SDLs raise actual cash for state budgets.

Prelims Hooks

• SDLs are dated securities (original maturity of 1 year or more). States issue only dated securities, not T-bills or CMBs [2].
• RBI manages state debt by agreement and central debt by statute (RBI Act 1934). The Government Securities Act 2006 governs all G-secs.
• Article 293: a state that owes money to the Centre needs the Centre's consent to borrow.
• Primary dealers (from 1995-96) may underwrite SDL auctions as well as central G-sec auctions [3].
• FPI limit: 2% of outstanding SDLs versus 6% of outstanding central G-secs [1].
• Trap: "SDL spread" means the extra yield over a central G-sec of the same maturity. For example, 7.2% − 6.8% = 40 basis points.

Mains Points

• The spread as market discipline in fiscal federalism:
• States with weaker finances should pay a higher spread. This pushes them towards careful budgeting.

• But when SDL spreads are nearly the same across states, the market is not separating good and bad fiscal management. Captive SLR demand and investors' belief that the Centre stands behind states both weaken this signal.

• Centre–state control over borrowing:

• Article 293 lets the Centre control borrowing by states that owe it money. This protects overall fiscal stability.

• States argue that it limits their fiscal autonomy. This is a GS-II federalism debate.

• Debt management reform:

• RBI's dual role is a conflict of interest. As debt manager it wants low rates so that the Centre and states can borrow cheaply. As monetary authority it may need high rates to control inflation.
• A separate Public Debt Management Agency (PDMA) could fix this. But it would need a deeper and more liquid SDL market and coordination with every state.

Related concepts

• Government securities
• Dated securities
• Primary dealer
• Inflation-indexed bond
• Oil bonds
• Sovereign Gold Bond
• Fully Accessible Route
• Global bond index inclusion

Read more

• The government securities market