An approx value change in your Pension Lump Sum Value is based on your balance.
$1 million then every 1/4% interest rate move affects Pension by $50k
$2 million then 1/4% effects Pension by $100k
So you can figure up quickly if rates go back to 2018 of 3.5% from current 0% rates .
3.5% is still low rate but based on 0% now, that will CRUSH your Pension to a tune of 50% less!
Now if you take monthly payments, that is NOT effected by interest rates. Only Lump Sum payout option.
So a $1 million pension now will crash to 600k if rates go to just 3.5% but your monthly payment option amount will stay the same..
If you want Lump Sum then take now while value is Max, if you want monthly payment you can leave anytime as it will be same.