RIMM, which is up for a fifth day and has added 16.1 percent this week on optimism for Blackberry and Playbook sales, sees an interesting spread trade midday. Shares have gained 67 cents to $56.88 on the session and one strategist pays $1.55 for the March – June 57.5 put spread, 16600X. The spread looks opening and possibly a play on shares trading above $57.5 through the March expiration, but then trading lower through June 2011. It also appears that the spread traded more than once, as volume in both contracts now exceeds 30000.