The Fidelity index has risen by 1.1% over the past week.
The index is up nearly 1% in 2017 so far.
The Fidelity Stock Index (FTSX) has gained 1,100 points since mid-July, up 1.9% from its mid-June closing price of $35.20.
The market has gained more than $30 billion since then, and is now trading at $35 per share.
FTSX is up about 1.5% in the past year.
The index, which tracks companies that invest in retirement plans, stocks, ETFs, or other securities, is based on the price of a basket of 100 stocks, according to FactSet.
The FTSE composite index is about 1,700.
The Nasdaq is up 1% this week, up by more than 1% from the same week a year ago.
The Dow Jones Industrial Average has risen nearly 3% this year, the S&P 500 has gained almost 1%, and the Nasdaq Composite has risen more than 5%.
The FTS E-mini is up almost 2% this month.
The S&P 500 is up 4.2%.
The Nasher Index is up 3.5%.
The Russell 2000 is up 2%.
The NASDAQ is up 5.4%.
The Dow is up 26%.