Hot Topics in Tech:

• Investors Lose in Today's Markets, Says Former NYSE Head Grasso.
• NYSE Draws Users' Ire with Fee Increases, Patent Charge Proposal.
• Mini flash crash? Trading anomalies on manic Monday hit small investors.
• Algorithmic Trading: The Play-at-Home Version
• International HFT Backlash: China targets high-frequency traders in "spoofing" probe
• Symphony is just the latest attack on Bloomberg's fortress
• 3Red set for "spoofing" legal battle

The Inbox: Listener questions and comments

• Question from GG: Has there ever been talk of some sort of technology glitch or shutdown futures? In the wake of the NYSE problems it seems there would be a fertile market for such a product. Firms could hedge themselves against system risk. Please discuss.
• Question from Cybortrader: when the race to zero winds down to its inevitable conclusion what do you think will be the next big battle ground for HFTs? CPU/GPU cycles? Co-location proximity? Where will the war rage next? Thank you for your thoughts. I very much enjoyed the episode with Thomas Peterfy of interactive brokers.