NAV cut-off time reform for mutual funds (1 February 2021)
The NAV cut-off reform effective 1 February 2021 was a fundamental change to the rules governing which net asset value (NAV) is allotted to a mutual fund investor’s purchase transaction, implemented by the Securities and Exchange Board of India through Circular No. SEBI/HO/IMD/DF2/CIR/P/2020/253 dated 31 December 2020. Prior to this reform, mutual fund purchases above Rs 2 lakh in debt schemes were allotted the same-day or next-day NAV if the transaction application was submitted before the scheme’s cut-off time, regardless of whether the investor’s funds had actually reached the AMC’s account. The reform mandated that the applicable NAV be allotted only after the investor’s funds were realised in the AMC’s bank account, regardless of the time of application submission. This change eliminated a timing arbitrage mechanism that had been exploited by large institutional investors and treasuries in debt funds.
Background: the pre-reform cut-off mechanism
Before 1 February 2021, the NAV allotment rules for mutual fund transactions followed a time-based cut-off system established in SEBI’s guidelines:
- For liquid fund purchases: NAV of the day prior to application receipt (T-1 NAV) was applicable if the application was received before 2:00 PM, subject to certain conditions about fund realisation.
- For debt scheme (other than liquid) purchases above Rs 2 lakh: the applicable NAV was the NAV of the day of application receipt if the application was received before 3:00 PM (the cut-off time), even if the funds were transmitted by RTGS or NEFT and only reached the AMC’s account the following morning.
- For equity scheme purchases: NAV of the day of application receipt was applicable if received before 3:00 PM.
The critical gap in the pre-reform framework was in the debt scheme category for large purchases. An investor who submitted a purchase application before 3:00 PM received the that-day’s NAV even if the actual fund transfer (RTGS or NEFT) was initiated simultaneously and would only be credited to the AMC’s account after banking hours, typically by 7:00–9:00 PM. In effect, the AMC was allocating units at the day’s NAV before it had received the investor’s money.
The timing arbitrage problem
This gap enabled a form of timing arbitrage, particularly exploited by corporate treasuries, NBFCs, and large institutional investors managing short-term liquidity in debt funds:
Mechanism: A treasurer observing that a debt fund’s intraday indicative NAV was likely to rise (due to a fall in bond yields during the day) could submit a purchase application just before the 3:00 PM cut-off and initiate an RTGS transfer simultaneously. The purchase would be processed at the day’s closing NAV, which incorporated that day’s bond price appreciation, while the funds would arrive the next morning. The investor captured one day’s yield appreciation (typically 3–8 basis points in short-duration funds) without bearing the overnight NAV risk, because the NAV had already been determined when the funds were still in the investor’s account.
In reverse, an investor could redeem from one fund and immediately subscribe to another using the same day’s NAV for both sides, effectively getting two days’ worth of NAV exposure on one night’s capital.
While individual instances of this arbitrage were modest in size, the aggregate effect of large institutional investors systematically exploiting the mechanism was significant, particularly in liquid and ultra-short bond funds where even 3–5 basis points mattered in the context of overall scheme yield. It also created inequity between large institutional investors (who could execute precisely timed RTGS transactions before 3:00 PM) and retail investors who submitted applications through distributors or online platforms after the cut-off.
The April 2020 SEBI circular
The first attempt to address this gap came in SEBI’s Circular No. SEBI/HO/IMD/DF2/CIR/P/2020/76 dated 30 April 2020, issued at the height of the Franklin Templeton winding-up crisis. SEBI required that for all mutual fund purchases (across all scheme categories and regardless of amount), the applicable NAV would be the NAV of the day on which the funds were actually realised in the AMC’s designated account, not the day of application submission. The circular was to take effect from 1 June 2020.
However, implementation was deferred multiple times due to technical challenges. Clearing and payment system infrastructure, particularly the BSE StAR MF and NSE Mutual Fund Service System (MFSS) platforms, required significant modifications to track funds realisation on a transaction-by-transaction basis and link realisation events to NAV allotment decisions in real time. Registrar and transfer agents (CAMS, KFintech) also needed to upgrade their processing systems.
The 1 February 2021 implementation
After deferred implementation, the reform took effect on 1 February 2021. The revised rule, as finally implemented, applied as follows:
| Transaction type | Applicable NAV rule (from 1 February 2021) |
|---|---|
| All purchases of any amount in any scheme | NAV of the day on which application is received AND funds are realised in the AMC’s account, if both occur before the scheme’s cut-off time; otherwise, NAV of the next business day |
| Purchases in liquid funds | Same funds-realisation requirement; T-1 NAV concept largely modified |
| SIP instalments | Not affected: SIPs processed through ECS/NACH mandates have pre-authorised debits that are treated as realised on the instruction date |
| Switch transactions within the same AMC | Treated as redemption from one scheme and purchase in another; funds realisation from the redemption proceeds determines the purchase NAV |
The reform effectively eliminated the overnight float that had enabled the timing arbitrage for large institutional investors.
Impact
The impact was most significant for liquid funds and short-duration debt funds, which had attracted the largest volumes of timing-arbitrage-driven corporate treasury flows. Some large institutional investors reduced their use of mutual funds for overnight cash management, preferring instead overnight deposits or the RBI’s Liquidity Adjustment Facility instruments, where the return was transparent and there was no NAV-allotment timing risk.
For retail investors, the reform had limited practical impact because most retail SIP and lump-sum flows through debit-linked online platforms were processed in ways where funds realisation and application submission were nearly simultaneous.
The reform was broadly welcomed by the Association of Mutual Funds in India and industry commentators as improving fairness and removing a structural advantage for institutional investors over retail participants in mutual fund NAV allotment. It was consistent with SEBI’s broader agenda of regulatory measures that levelled the informational and operational playing field between institutional and retail investors in mutual funds.
Key dates
| Date | Event |
|---|---|
| 30 April 2020 | SEBI issues first circular on funds-realisation NAV requirement |
| June 2020 | Implementation deferred pending system readiness |
| October 2020 | Second deferral |
| 31 December 2020 | Final circular (SEBI/HO/IMD/DF2/CIR/P/2020/253) confirming 1 February 2021 effective date |
| 1 February 2021 | Reform takes effect across all mutual fund schemes |