The Flow Monitor tool provides real-time options updates. Start by entering a ticker symbol and then select from a menu of commands. In addition, you can also see the action by the entire market using the @all symbol. And, if you like trading specific sectors, use the sector symbols. For example, @ener will pull up all of the options activity in the energy related names (@hlth = healthcare, @it = technology, @mat = materials.) We will post a complete list of the sector symbols shortly.

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Some less actively traded names seeing bullish order flow: Continental Resources (CLR), Apollo Investment Corp (AINV), St. Joe (JOE) Bearish order flow: Sara Lee (SLE), Infosys Tech (INFY), Puda Coal (PUDA) Post-Earnings: Apollo Group (APOL) Pre-Earnings: SAIC (SAI), LDK Solar (LDK) Ex-div.: Sysco (SYY), Bristol Myers (BMY), American Express (AXP), Annaly Capital Management (NLY), Liberty Property Trust (LRY), Patterson Companies (PDCO), Gol Lihnas (GOL), Medicis (MRX)

*Scanning all single-stocks subject to 2500 contracts minimum call or put volume

UBS is up 63 cents to $16.10 and options order flow is bullish after Bloomberg reported the bank’s first quarter fixed income revenue was said to be $2.3 billion. Shares saw an immediate spike on the news and April calls at the 15, 16, and 17 strikes are the most actives. 6,650 calls and 215 puts traded total. Implied volatility is up about 2.5 percent to 31.

Citigroup (C) is seeing a day of brisk trading after the US Treasury said it would begin selling Citi stock. The Treasury will sell about 7.7 billion shares acquired as part of a 2009 agreement that allowed the government to get common stock in exchange for preferred shares. The news has Citi shares down 14 cents to $4.17 and 862K options traded by midday. January 2012 calls at the 7.5 strike are the most actives, with some premium writers collecting 35 cents against shares. 112K contracts now traded. 87.7K April 4 puts traded (68% Bid). Jan 5 calls, April 4 calls, Jan 4 puts, June 5 calls are very busy as well. Implied volatility is holding around 41, and not significantly changed despite today’s news.

*Scanning all single-stocks subject to 2500 contracts minimum call or put volume

Unusual activity in MEMC (WFR) today. Shares are down a nickel to $14.63 and 29K calls now traded, compared to 5,750 puts. The action includes the buyer of 4500 April 14 – May 15 call spreads at a nickel, which might roll a bullish position from one month to the next (The spread has traded 9000X total). May 18 and April 15 calls are among the most actives. May 15, April 14, and May 14 puts are busy as well. Implied volatility is up 3 percent to 43.5, but with no obvious news to explain the jump in WFR options activity Monday morning.

EMC slips 21 cents to $18.35 and options volume is picking up Monday morning. About 10K puts and 3,850 calls traded so far. April 17, 18, and 19 puts are trading predominantly at the ask. Meanwhile, 2820 April 18 calls traded mostly on the bid. Implied volatility is up about 3.5 percent to 24 ahead of the company’s “EMC Executive Insight: A Conversation with Pat Gelsinger” scheduled for 1:00 ET today.