smallest number obtainable from 2020

If only the four basic operations, concatenation and parenthesis are allowed, the largest number which can be obtained from $2$ $0$ $2$ $0$ is... $2020$ :-) (If exponentials were allowed, $20^{20}$ would be much higher, of course). But what is the smallest number which can be obtained?

Clarifications (note that many answers were written before these were added):

• The numbers 2, 0, 2, 0 must be used in that order.



• None may be omitted.


• The "four basic operations" do not include unary + (which would be a no-op in any case) or unary - (which would e.g. allow -2020 as an answer).


• "Smallest" means "most negative", not "closest to zero".


• Concatenation may only be applied to literal digits.


• Exponentiation is not allowed, even though it is written without any explicit operators.


• Inserting decimal points is not allowed.

Answer

If only addition ($+$), subtraction ($−$), multiplication ($\times$) and division ($/$), without unary minus, then

$2 \times ( 0 - 20) = -40$