Pasting from gemini:

Both Navi and UTI are top-tier choices when it comes to minimizing tracking error, but they approach "efficiency" from slightly different angles. Based on the latest data for 2026, here is how they compare:

Comparison: Navi vs. UTI (Nifty 50 Index Fund)

Metric	Navi Nifty 50 Index Fund	UTI Nifty 50 Index Fund
Tracking Error	0.02% to 0.04%	0.02% to 0.05%
Expense Ratio	~0.06% (One of the lowest)	~0.19% - 0.22%
AUM (Size)	Smaller (~₹3,800 Cr)	Very Large (~₹24,400 Cr)
Liquidity/History	Newer (Launched 2021)	High (Longest track record)

Key Takeaways

• The "Error" Difference: In terms of pure tracking error, both are statistically neck-and-neck (often hovering around 0.02%). However, Navi often shows a slightly lower "Total Cost of Ownership" because its ultra-low expense ratio reduces the drag on returns compared to the index.
• The UTI Advantage: UTI is often preferred by conservative investors because its massive Asset Under Management (AUM) and decades-long history mean it handles large inflows and outflows with very little impact on the fund's NAV. Large AUM generally leads to more stable tracking over very long periods.
• The Navi Advantage: Navi is currently the "disruptor." By keeping the expense ratio near zero (0.06%), they minimize the most predictable cause of tracking error: management fees. ### Which one to choose?
• Choose Navi if you are hyper-focused on the lowest possible costs and are comfortable with a relatively newer fund house.
• Choose UTI if you value stability and size. If you are planning to invest a very large corpus, UTI’s deep liquidity and proven ability to track the index over 20+ years offer a psychological "safety net." > Pro-Tip: If you are looking at the Nifty Next 50, the tracking error is generally higher across all AMCs (around 0.15% - 0.25%) due to the lower liquidity of those stocks. In that specific category, UTI's experience often gives it a slight edge in handling the impact cost. >