There were many discussions of some of the most profitable bond funds PIMIX and IOFIX, one of which (PIMIX) was remarkably stable over many years. But the same people who made PIMIX so good are also responsible for PIMCO closed-end funds PDI and PCI. I believe that these funds have similar strategy, but they are much smaller, so they can be nimble, and they grow twice as fast. Is there any reason they are not often mentioned in our discussion, apart for the formal reason that they are closed-end funds? Does it make them much more risky? PCI trades at a slight discount, whereas many other PIMCO closed-end funds trade at big premium. These two funds dominate the bond part of the Income ETF portfolio of the M*. What do they see in PDI and PCI that others are missing? I have a substantial part of my bond portfolio in these two funds, and so far I am very happy about them, but I am trying to figure out whether I should add to PDI and PCI, or invest in PIMIX and IOFIX instead?