The BSE MidCap and the BSE SmallCap indices lost 21% and 30.7%, respectively, since January 2018. On the other side of the market cap divide, the large-cap based BSE Sensex has been masking the pain. The bellwether gained 12% since January 2018, and till recently was soaring to new highs, although, While the Sensex and Nifty have fallen just 3.43% and 4.46% respectively from their all time highs of 36,283 and 11,130 reached on January 29, 2018, the BSE small cap and midcap indices are down nearly 19% and 15% from their all time highs of 20,183 and 18,321 reached in January this year. View the basics of investing, understanding market capitalisation and allocation between large cap, mid cap, small cap stocks and other asset classes. Also view the Charlie Munger's influencing stock picking style only at Equitymaster.com.