Now you're just debating additional income. However, say your company lost -$10,000. If you profited $10,000 in stocks -- you technically made $0 in profit, which means you still don't need to pay taxes, even on the profit on stocks.
...and if your business is really killing it, and you're also killing it in the stock market, I am certain you won't have a problem paying a few dollars to the US Gov. It's still better than other investment avenues :-)
