Here are some companies that have had a pipe deal from Rodman & Renshaw and the effect on their stock prices within the past 6 months.
ctic - 4 deals Sept 15 $9,000,000
sept 29 $14,200,000
oct 22 $24,700,000
dec 5 $32,650,000
stock price from Dec 5,.13 to .39 hit as high as .96
norhtfield
march 13 for $1,432,232
stock price march 13, .48 to april 4, .41
PharmAthene
March 24 $5,501,745
stock price march 24, $2.70 to april 4, $2.47
From What I can see with similar deals the only thing that has effected the stock price since the deals is other news releases since the deals.
The deciding fact with Genta is going to be the results coming out form the Agenda trails and possible approvals the financing doesn't look like it is going to be bad for Genta in the short term.