Would you be willing to do so for me the next time the yield falls below 2%?
The fact that you dare to quote 2% now is because the current rate is way above 2%.
If the current rate is 10%, I would even dare to quote 5% or 6%. But this is utterly meaningless because I already know the current rate is 10%.
The interest rates for t-bills are largely based on bids submitted by large corporations/financial institutions. I personally do not have prophetic abilities to forecast whether it will be 3.57% or 3.60% and make a bid on this basis. What if it turns out to be 3.55%? Oops?
So then am I exposed to the black swan event of getting "2%"? Yes, but that would mean that all the big institutions submitted extremely low bids based on the information available to them. The big boys with all their professional investment teams, with the wide universe of investments available to them, submitted a lowly bid of 2%? For no apparent reason at all? When US rates are above 4%?
Sure, if this were to happen, I would be very worried because it means they (including my wonderful local bank DBS) have either gone crazy or have very deep insider information that would warrant an investigation from MAS.
TLDR:
It is meaningless to duapao and make quotes based on known prices.
Institutional investors are not dumb and also want to maximise their returns.
NC is not useless if you don't have a view on interest rates. If you have a view on interest rates, submit a competitive bid by all means.