As the Dow 30's largest component (9.6% due to the Dow's 'price-weighting' methodology), IBM's...

|By:, SA News Editor

As the Dow 30's largest component (9.6% due to the Dow's 'price-weighting' methodology), IBM's earnings tonight could have an especially potent effect on ETFs covering the DJIA, including DIA, DOG, DDM, DXD, UDOW and SDOW. Another fund sure to react strongly is IAH; IBM makes up 33% of its portfolio.