What Is an Arbitrage Fund? How It Earns Equity Tax Treatment on Low Risk

There is a unique category in the Indian mutual fund universe that sits at the intersection of low risk and favourable taxation: the arbitrage fund. It exploits price differences between stock markets and futures markets to generate near-risk-free returns — and because it is classified as an equity fund by SEBI, it benefits from equity taxation, which is kinder than the slab-rate tax now applied to debt funds.

How Arbitrage Works

The core strategy is simple: buy a stock on the NSE/BSE cash market and simultaneously sell an equivalent futures contract at a higher price. At futures expiry, both positions are squared off at the same price — the profit is the spread, locked in at the moment of the trade, regardless of how the stock price moves.

Arbitrage Profit = Futures Price − Cash Price − Transaction Costs

Example:
  Reliance Cash Price    = ₹2,950
  Reliance Near Futures  = ₹2,972
  Gross Spread           = ₹22 per share
  Transaction Costs est. = ₹4 per share
  Net Profit             = ₹18 per share (locked)

This spread exists because futures prices embed the cost of carry (interest rate) for the contract period. As RBI repo rates are around 6.25–6.5%, the annualised spread in arbitrage funds typically tracks close to short-term money market rates — roughly 6–7% p.a. in a normal rate environment.

Why the Tax Treatment Matters

SEBI classifies arbitrage funds as equity-oriented funds because at least 65% of their assets are deployed in equity and equity derivatives at all times. This triggers equity capital gains tax rules:

Compare this to a liquid fund held by a 30% bracket investor: gains taxed at 30%. An arbitrage fund held for just over a year gives LTCG at 12.5% (above the ₹1.25 lakh exemption) — a significant post-tax advantage.

Post-tax return comparison for 30% bracket, 1-year holding:

Liquid Fund: 6.8% × (1 − 0.30) = 4.76% post-tax Arbitrage Fund (STCG): 6.5% × (1 − 0.20) = 5.20% post-tax Arbitrage Fund (LTCG > 1 yr): 6.5% × (1 − 0.125) ≈ 5.69% post-tax

Risks — Lower Than You Think

Arbitrage funds are often described as "risk-free" but that is an overstatement. Key risks include:

1. Execution risk: If the cash-futures spread compresses between order placement and execution, the locked profit shrinks.
2. Liquidity risk in F&O: Illiquid stocks in futures have wide bid-ask spreads that eat into profit.
3. Dividend/corporate action risk: An unexpected dividend can shift the cash-futures parity.
4. Rolling risk: Monthly futures must be rolled to the next expiry; if the roll spread is negative, the fund earns less.

In practice, arbitrage fund NAVs are extremely stable — far smoother than even short-duration debt funds. Large drawdowns are virtually unheard of in this category.

Arbitrage Fund vs Liquid Fund vs Savings Account

For amounts you will not need for at least 30+ days and you are in the 20–30% tax bracket, arbitrage funds are generally superior on a post-tax basis.

Who Should Invest in Arbitrage Funds?

• High tax bracket investors (20–30%) parking short-to-medium term surpluses.
• Salaried employees receiving a large bonus or ESOP proceeds who need parking for 3–12 months before redeployment.
• Corporate treasuries that have crossed the risk threshold for liquid funds but want equity taxation.
• STP source: Park a lump sum in an arbitrage fund and set up an STP to equity funds — similar to a liquid fund STP but with better post-tax returns for long-horizon STPs.

Use our SIP Calculator to model how an STP from an arbitrage fund into an equity fund might grow.

How to Invest

1. Select a large-AUM arbitrage fund — HDFC Arbitrage Fund, ICICI Prudential Equity Arbitrage Fund, or Kotak Equity Arbitrage Fund are among the most liquid.
2. Choose Direct Plan — Growth option.
3. Note the T+2 settlement cycle for redemptions — plan cash needs accordingly.
4. Hold for at least 1 year to access LTCG rates; hold for at least 3 days before redeeming to avoid the 0.01–0.25% exit load charged by most funds.

Conclusion

Arbitrage funds occupy a unique niche: near-debt-like stability with equity-fund taxation. In a post-2023 world where debt fund tax advantages have been stripped away, arbitrage funds have become the go-to short-term parking vehicle for investors in higher tax brackets. Understand the T+2 redemption lag and the 1-year threshold for LTCG, and these funds can meaningfully improve your after-tax cash management returns.

These figures are estimates for educational purposes. Consult a SEBI-registered advisor for personalised advice.