Was the new government established by southern states that had seceded

The Confederate States of America

Explanation:

The issue of slavery was the main cause of the rift between the Northern and Southern states in the nineteenth century. In 1950 states of South Carolina and Mississippi asked for secession. In the second half when Lincoln became president, this issue became important as the southern cotton economy was based on slave labor. In 1860, 11 states seceded from the USA. They were known as the Confederate States. It existed from 1861 to 1865.

the answer is: must pay taxes on profits

since it is considered as a part of your income, profits from investments is eligible for tax payment.

the tax from your investment could be influenced by how long you decided to sell it. united states promotes keeping your investment for long term period. so, the tax rate for investments that you sell in less than one year is typically higher compared to investments that you sell in more than one year period.