SQL can I do this without 2 CTE?

Hi,

I have a transaction table with different rates that may be indicated by a flag as either a discount(reduction) or a premium(surprime).
I need the maximum of each type of rate.

I'm using

with
reductions as ( select max(rate) as max_reduction from mytable where reductionFlag = '1'),
surprimes as ( select max(rate) as max_surprime from mytable where surprimeFlag ='1')
select * from reductions join surprimes
;

But I wonder if there's a simpler way?

Thanks