Twitter Day + One

So I now look at the details of yesterday's mistake: when I accidentally bought 300 options at market when I thought I was buying 300 shares of SDS at market.  

My loss of over $500 was the commissions!  On 300 option contracts on the November 8, 2013 (today) 33 puts on SDS.  The options are now quoted at $.60. They were $.14 when I bought and sold.

My commissions on the 300 SDS would have been zero.