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ETF of the week: Buy whole stock market for cheap

Traders work on the floor of the New York Stock Exchange.
Brendan McDermid | Reuters
Traders work on the floor of the New York Stock Exchange.

The most exciting exchange-traded fund in the world this week is one of the most boring funds on the planet.

The iShares Core S&P Total Stock Market ETF (ITOT) is about as basic as they come. The fund holds broad exposure to U.S. equities, trades well and is available commission-free for people with Fidelity brokerage accounts.

It's exciting, however, because on Tuesday, iShares slashed the expense ratio of ITOT from 0.07 percent to 0.03 percent. The move makes it the single cheapest equity ETF in the United States, and the least expensive way for the average investor to put money to work in the stock market.