Group 1 - The report highlights that funds with a "negative duration" characteristic achieved an average excess return of approximately 1.42% during the year-end period [1] - The negative duration strategy is not merely a hedging approach but an active directional interest rate strategy, adjusting the overall duration of the portfolio to zero or negative to gain returns during rising interest rate cycles [6][7] - A typical operation involves holding short-duration credit bonds or interest rate bonds as the base and selling longer-duration government bond futures, allowing for a negative correlation between the portfolio's net value and interest rate changes [6][7] Group 2 - The analysis identified 64 funds that significantly diverged from their benchmark index for more than 10 days, representing a market size of approximately 116.2 billion, accounting for 2% of the total size of medium to long-term bond funds [7] - Among these, 5 funds diverged for over 20 trading days, with a total size of about 6.4 billion, achieving a weighted average return of 0.88%, resulting in an excess return of 1.42% compared to the total return index [7] - Funds that diverged for over 30 days, although only 2 in number, achieved an average excess return of 1.51%, indicating that systematic use of the negative duration strategy can create excess returns in a clearly defined rising interest rate environment [7][8] Group 3 - The report provides a weekly overview of bond funds, noting that the ETF market pressure has eased, with funds favoring short-duration credit and high-elasticity varieties [10] - Since January 12, the bond ETF market sentiment has improved, with significant net inflows observed in short-term credit bond ETFs, which turned into a net inflow of 3.59 billion, a 104.4% increase compared to previous periods [10] - Trading activity has concentrated on high-elasticity sectors, with convertible bond ETFs seeing a 36.9% increase in weekly trading volume [10]

Core Viewpoint - The article discusses the increasing use of government bond futures linked to cash bonds strategies in the turbulent market of 2025, focusing on four main strategy building models. Group 1: Enhancing Yield and Stability - The strategy of using government bond futures to enhance the yield of credit bonds is highlighted, where investors can lock in base yields by purchasing highly liquid short-term bonds while using sufficiently discounted government bond futures to supplement duration. This approach yielded an excess return of 35 basis points in the second quarter of 2025 through a combination of "9M certificates of deposit + TL contracts" [1]. Group 2: Duration Adjustment Strategies - The article outlines how investors can quickly adjust duration in response to market volatility using a "negative duration" strategy. This allows investors to leverage positions to extend duration during bullish sentiment and establish short positions during market downturns, effectively transforming market declines into investment gains [2]. Group 3: Hedging with Government Bond Futures - The effectiveness of using government bond futures for hedging long-duration credit bonds and local government bonds is discussed. While the hedging effect may be limited, it can smooth net asset value fluctuations, keeping them within a narrow range of -2% to 2%. Additionally, the article notes that exploiting the differing volatility patterns between government bonds and local/credit bonds can capture spread contraction opportunities [3]. Group 4: Arbitrage Opportunities - The article identifies arbitrage opportunities arising from temporary pricing anomalies between cash bonds and futures or across different contract maturities. A positive spread strategy is suggested when the IRR and funding rate spread exceeds 100 basis points, with historical data indicating an average monthly return of 0.3%. Cross-product arbitrage strategies are also mentioned, with potential returns of approximately 0.34% and 0.56% during specific market conditions in 2025 [4].