CBOE Holdings, Inc. (CBOE) is seeing a spike in option volume/volatility following news that the Deutsche Borse and NYSE Euronext have halted trading.

Atmel Corp. (ATML) sees a large Bullish Call spread trade this morning following the company's better than expected earnings release yesterday after the close.

Baxter International Inc. (BAX) sees a large block of Calls purchased this morning with an investor reaching out to the August expiry and buying 17,600 of the 55 strike options at $.77.

Tyson Foods Inc. (TSN) is seeing unusual Call activity ahead of tomorrow mornings Q1 earnings release with investors buying the April 19 Calls.

Electronic Arts, Inc. (ERTS) is seeing unusual option activity ahead of this afternoon's Q3 earnings release.

Riverbed Technology, Inc. (RVBD), the San Francisco based networking and communication device maker, is seeing unusual Put activity this morning with investors buying the March 34 strike Bearish options.

Mattel, Inc. (MAT) will be releasing its Q4 earnings on Wednesday after the close and today's option activity suggests at least one investor is bracing for a gap in the company’s share price, either up or down.

Banco Bradesco S.A. (BBD), the ADR on Brazil's second largest bank, sees an interesting option trade ahead of Monday's earnings release.

Thoratec Corp. (THOR), the producer of implantable heart pumps, released its fourth quarter results after the close yesterday missing analysts EPS expectations by 7% and forecasting lower than anticipated growth in 2011.

Pfizer, Inc. (PFE) sees a large block of Calls purchased today with an investor buying 50,000 March 20 strike options for $.08

Alcatel-Lucent, the telecommunications equipment and services provider based in Paris, France, is seeing unusual Call activity this morning with most of the focus on the Feb. 3.5 strike.

Pep Boys-Manny, Moe and Jack (PBY) shares see a mid-morning spike after Bloomberg reports that the company is considering a sale and is working with Bank of America Corp.