Provided by Dow Jones By Akane Otani International Business Machines Corp.'s stock is falling. Again. The tech company, whose shares have declined steadily since peaking in 2013, slid 11% Friday after reporting a drop in sales for every quarter of 2020. The stock move puts IBM's performance among Dow components in a familiar spot: at the bottom. IBM was the single biggest drag on the blue-chip index between its climb from 20000 in January 2017 to 30000 last November, according to a Dow Jones Market Data analysis. Although the stock market rose to numerous records over that time, IBM shares fell, shaving 367 points off the Dow.