Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Short or Long Term Capital Gains for Multiple Investments
The default is FIFO: first in - first out. Unless you specifically instruct the brokerage otherwise, they'll report that the lot you've sold is of Jan 5, 2011. Note, that before 2011, they didn't have to report the cost basis to the IRS, and it would be up to you to calculate the cost basis at tax time, but that has been changed in 2011 and you need to make sure you've instructed the brokerage which lot exactly you're selling. I'm assuming you're in the US, in other places laws may be different.