Merck, IBM share losses lead Dow’s nearly 250-point drop

Shares of Merck and IBM are trading lower Tuesday morning, sending the Dow Jones Industrial Average into negative territory. The Dow was most recently trading 248 points, or 0.5%, lower, as shares of Merck and IBM are contributing to the blue-chip gauge’s intraday decline. Merck’s shares have fallen $3.24 (3.2%) while those of IBM are down…