A recent spurt of buying interest took the Nasdaq back to the neutral line, but it has failed to poke back into positive territory. Weakness in shares of Research In Motion (RIMM 48.83, -7.76) has hampered the tech-rich Index. Shares of RIMM are down dramatically in high volume, which is already quadruple its daily average, in response to a disappointing forecast for earnings. The stock now sits at a six-month low.