The Indian equity derivatives market is one of the most active and liquid in the world by volume, processing millions of futures and options contracts every trading day across thousands of individual stocks and index instruments. This extraordinary level of activity creates a continuously shifting landscape of pricing relationships between cash and futures segments—and within those shifting relationships lies the raw material from which professionally managed arbitrage strategies extract their returns. Investors who understand this landscape—how it functions, what drives the spread between cash and futures prices, and how professional managers systematically harvest that spread—are equipped to evaluate Arbitrage Funds with the kind of informed perspective that transforms this category from a mysterious black box into a transparent and rational investment vehicle. Among the well-regarded fund houses operating in this space, Kotak Arbitrage Fund represents a systematic and institutional approach to extracting these market-embedded returns through rigorous execution and disciplined portfolio management. The mechanics of cash-futures spread generation and the factors that determine how much spread is available to capture at any given time deserve careful examination by any investor considering allocation to this strategy.
The Futures Premium Cycle Across Different Market Environments
The premium at which futures contracts trade above the corresponding cash price in the Indian market is not constant—it fluctuates in response to the demand for leveraged long exposure in the derivatives segment, which in turn reflects the prevailing level of bullish sentiment among market participants.
During the early and middle phases of a bull market, when retail investors and institutional traders are most enthusiastic about taking on leveraged equity exposure, the demand for futures contracts is high, and the premium expands. More participants want to buy futures than want to sell them at fair value, which pushes futures prices higher and creates larger spreads for arbitrage fund managers to exploit. During bear markets or periods of sharp sentiment deterioration, the reverse occurs: leveraged long demand collapses, some participants actually seek to establish short futures positions, and the premium may compress to minimal levels or even temporarily disappear.
This cyclicality in spread availability explains the fluctuation in arbitrage fund returns across different market environments. In calendar years with strong and sustained bull markets, arbitrage fund returns have historically been more attractive than in years characterised by range-bound or declining markets. Understanding this relationship helps investors set realistic return expectations for different market scenarios rather than projecting past peak returns into future periods with very different market characteristics.
The Rollover Mechanism and Its Impact on Return Continuity
Within the Indian market, futures contracts have fixed maturity dates – generally the last Thursday of each month for monthly contracts and a specific maturity date for weekly contracts. An arbitrage fund that has established a currency-long, futures-short position must decide, as each contract approaches its expiration, whether or not to allow the position to settle or roll the futures level forward to a subsequent expiration settlement.
Rolling forward is still ending the future work and at the same time starting a brand new quick position by next month’s settlement, which will allow the fund to maintain its guaranteed size and keep the top interest rate available without disturbing the income cash equity position. The economics of the conversion is based on the fact that the spread must be within the forward contract in relation to the development that remains at the end of the term settlement. When the market is in a nation of quality distribution – where each successive futures expiry trades in a better peak class than the previous one – rollovers are attractive and increase fund returns. Rollovers can also lead to less attractive economics when the shape of the term is flat or inverted.
Stock Selection Within the Arbitrage Universe
Not all stocks are equally suitable for arbitrage strategies. The ideal arbitrage candidate is a stock with deep liquidity in both the cash segment and the derivatives segment, a wide and stable spread between cash and futures prices, and a manageable level of corporate event risk during the futures holding period.
Corporate events—dividend announcements, bonus issues, stock splits, and rights offerings—can create sudden and significant changes in the cash-futures relationship that complicate the arbitrage trade and require careful management. Skilled arbitrage fund managers maintain detailed awareness of upcoming corporate events for all stocks in their universe and manage their positions accordingly—either avoiding stocks with imminent events or adjusting positions to account for the event impact.
The breadth of the investable universe also matters: a fund with a larger number of arbitrage positions has a more diversified spread of individual stock risks and is less exposed to idiosyncratic events affecting any single position. This diversification within the arbitrage portfolio is an important risk management dimension that the most professionally run funds in this category take very seriously.
Measuring Arbitrage Fund Performance With the Right Metrics
Evaluating the performance of the arbitrage fund requires unconventional metrics than those used in a policy-funded equity budget or a duration-sensitive debt budget. Key performance indicators for arbitrage funds include stability of return distributions in particular market environments, the overall performance of the fund relative to peers over rolling periods of one-three-12 months, and consistency of monthly returns instead of any rate of return at all.
Intermediation should no longer be valued in terms of equity vehicles – this valuation is meaningless because the method does not take into account the risks of the equity route. They should be valued against the relevant short-term units, both in composite liquidity funds and ODI funds, on an after-tax basis for the correct tax scenario of the investor. A fund that consistently generates moderate returns to liquid funds, on a threat-adjusted after-tax basis, is manipulating the particular cost of an arbitrage strategy over multiple market cycles.
