The Bloggers' Net Worth Index (BNWI), sponsored by the Moneysmartz Personal Finance Blog, produces monthly data on changes in the net worth of personal financial bloggers.

The January BNWI increased 4.7 percent, comparing favorably with the Dow Jones, NASDAQ, and S&P stock indices.

Personal finance bloggers of note include Mapgirl's Fiscal Challenge , with a 208 percent increase over December; NYC Money, with the largest reported net worth of $743,636; and Seattle Simplicity , with the largest dollar increase of $38,701.

Fueled by easy-to-use blogging tools and online net worth tracking tools such as Net Worth IQ, the popularity of individual personal financial blogging continues to grow.

Selection criteria for the BNWI includes financially oriented blog content, recent posting activity, and self-reported net worth.

Personal financial bloggers interested in the BNWI program should send an email to the Moneysmartz Editor.