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 不過我發現 Fidelity 一般能比Etrade 拿到稍微competitive一點的 bid  和 ask

All these are not important. As i mentioned before, you do not want to day trade bond. For long bond, you want to trade  波段。For example, the 20Y bond I bought around 4.75% in April was sold around 4.1% in late Sept. That was almost 11-12% gain (not counting the 6 month interest on it). 

So, whether you paid for a 4.77% yield or 4.73% yield wont make a huge difference

所有跟帖： 

• 如果你當時買的是4%以上的coupon，duration到不了20的 -楚懷沙- ♀ (0 bytes) () 10/27/2024 postreply 20:19:55

• You need to look at 2nd market, look here -三心三意- ♂ (197 bytes) () 10/27/2024 postreply 20:43:33

• In general, you want to buy a mix of coupon rate together -三心三意- ♂ (421 bytes) () 10/27/2024 postreply 20:58:56