Forward rate discounts

I'm working with the following task:

"You are convinced that the bond market is dominated by long-term investors. Hence, you have your own view on the liquidity premium/discount that forward rates embody. Given that, do you think that a duration of 3 years for this portfolio is a good idea or a duration of -3 years would be better?" (The provided yield-curve is upward sloping).

First, liquidity discount and premium are in contrast to each other?

Second, could anyone explain why/if the forward rates embody a liquidity discount because the market is dominated by long-term investors?

What does it involve if the forward rates embody a liquidity discount, and what will this imply for the future expected rates?

This is the solution, but it doesnt make much sense to me:

"Market dominated by long-term investors ⇒ Liquidity discount ⇒ E[r] > f Upward sloping yield curve ⇒ f > y0 In other words, forward rates above current yields. And, on top of that, we need to take into account the liquidity discount to obtain the expected short rates. Hence, future interest rates are expected to increase and, thus, one would prefer a portfolio with a duration of -3."

What are your assumptions about a market dominated by long term investors?

• For example if the market is dominated by investors does that mean demand outweighs supply so that yields are generally lower?
• Does long term mean this level of demand for bonds will persist for a long time or that the investors are predisposed to buy maturities of durations longer than another?
• Do your long term investors have the ability to buy short term maturities and roll them on an on going basis to allow them the possibility of investing for the long term via multiple short dated instruments?

I know this isn't an answer to the question but I have seen first hand how models do not reflect reality and this model seems incredibly simple for this type of analysis. I don't agree with the solution because I don't agree that the 'implications' will always be upheld, and there are 3 of them before the conclusion with scope for much argumentation. This is my own pragmatic view and not necessarily consistent with any of the academics that you are being taught so take it with a pinch of salt.