From the m-cap of BSE-listed companies crossing the $4 Tn mark to the most memorable quotes by Charlie Munger,  here's a rundown of 11 significant news stories to keep you in the know:

John Boumphrey, Amazon's UK Country Manager, told reporters that in the UK alone the online retail giant last year sold more than 4 million used or refurbished products at a discount.

Shares of Aster DM Healthcare Ltd ended at ₹332.65, down by ₹4.75, or 1.41%, on the BSE. Founded in 1987 from a single clinic in Dubai, Aster DM has a strong presence across primary, secondary, tertiary, and quaternary healthcare and runs 33 hospitals, 127 clinics, 527 pharmacies, and 229 labs and patient experience centres in six Gulf countries and India.

Born in 1924, Munger would have turned 100 on New Year's day.