I will have an investment loss of ~$2000 for 2018, after netting out investment gains. Will this loss reduce my 2018 taxable income or will it be carried to 2019?

[jross-loyola]

For 2018, I only earned income from my salary / bonus, no "other" sources of income.

[Lisa995]

You can use $3000 in capital losses each year, so the $2000 loss you have should be used against your 2018 income, not carried forward to 2019.