Today’s tickers: PFCB, IMAX & VRA PFCB  - P.F. Chang’s China Bistro, Inc. –  Options on the owner and operator of two restaurant chains, P.F. Chang’s China Bistro and Pei Wei Asian Diner, were more active than usual this week following the Company’s fourth-quarter earnings report ahead of the bell on Thursday. Shares are up sharply today on a number of analyst upgrades, trading higher by as much as 8.1% to touch an intraday peak of $38.50. Traders that purchased calls on P.F. Chang’s yesterday despite the Company’s earnings miss, in some cases saw the value of their positions significantly increase overnight. It looks like investors purchased as many as 750 calls at the Mar. $35 strike yesterday for an average premium of $1.34 each. The calls today cost more than two times that amount, with the last traded price on the contracts up at $3.40. Finally, options traders positioning for shares to extend gains purchased some 250 calls up at the Mar. $40 strike at a premium of $0.60 apiece. Investors long the $40 strike calls stand prepared to profit in the event that shares in P.F. Chang’s increase 7.0% over the current price of $37.95 to exceed the effective breakeven price of $40.60 at March expiration. PFCB’s shares last traded above $40.60 back in July 2011. IMAX  - IMAX Corp. –  Shares in the entertainment technology company are up 0.35% at $23.81 this morning, down 4.75% off a six-month high of $25.00 reached earlier in the week. The stock has rallied 90.0% off its October 2011 52-week low of $12.57, but options activity on IMAX Corp. today suggests one strategist expects the price of the underlying to reverse course in the near term. The stock and option combo initiated on IMAX in the first hour of…