Group 1: Strategy Overview - The local government bond and national development bond arbitrage strategy offers more stable returns and higher tolerance for errors compared to traditional IRR strategies[1] - The strategy involves taking on certain yield spread and liquidity risks to achieve a thicker safety cushion[1] - The yield advantage of local and national development bonds typically exceeds that of comparable government bonds, allowing for greater net interest margin retention[1] Group 2: Sources of Returns - The returns from the strategy can be broken down into three components: net interest margin (yield - funding cost), yield spread changes, and basis returns[9] - The net interest margin provides stable cash flow and can offset potential basis losses or short-term volatility risks[9] - The strategy's profit is directly linked to yield spread changes; when local and national development bonds outperform government bonds, the strategy gains additional capital appreciation[9] Group 3: Conditions for Arbitrage Opportunities - Successful capture of arbitrage opportunities requires that the IRR exceeds the funding cost, establishing a safety cushion[12] - The yield spread between local and national development bonds must be at a historically high percentile to ensure a favorable risk-reward ratio[12] - Historical backtesting shows that the 30-year local government bond strategy outperforms the 10-year national development bond strategy in terms of overall win rate and return thickness[13] Group 4: Current Market Insights - Currently, the yield spread for both the 10-year national development bond and the 30-year local government bond is at a high level, indicating potential for recovery[17] - The static IRR advantage of TL contracts is not prominent, but there are opportunities for arbitrage when IRR rises during trading sessions[17] - The 10-year national development bond strategy requires precise timing, suggesting a strategy of quick entry and exit upon clear market signals[17]