A Charles Schwab branch. (Photo: AP)

Charles Schwab (SCHW) said late Thursday that it has added 65 exchange-traded funds to Schwab ETF OneSource. This brings the total number of ETFs on the platform to 182, all of which trade online without commissions.

New ETF providers to OneSource are ALPS, Direxion Investments, Global X Funds, IndexIQ, PIMCO, ProShares and WisdomTree. They are bringing a total of 28 new funds.

Existing providers, such as ETF Securities, Guggenheim Investments, PowerShares, State Street SPDR, United States Commodity Funds and Charles Schwab Investment Management are adding 37 ETFs to the platform.

“We know that every dollar counts for investors – and trading commissions can really add up, so they are crucial when evaluating the total cost of an ETF,” said Heather Fischer, Schwab’s vice president of ETF Platform Management, in a press release.

The OneSource platform has $31 billion in assets under management, the firm says. Year-to-date flows into ETFs on the platform are $5.9 billion, representing 45% of total ETF flows at Schwab.

The company says that investors can trade ETFs on its OneSource platform without fees. However, trades placed through a financial advisor have a fee of $25, while those placed by phone cost $5.

This summer Schwab released an ETF investor study, which found that 85% of investors believe that the ability to trade ETFs without commissions is important. Close to 70% say that having the “right selection of ETFs” matters most, while almost 60% indicate that having ETFs in the broadest number of asset categories is important.

“Investors are looking across asset categories and index weightings for new ideas to build highly diversified portfolios in a cost effective way,” Fischer said. “We’re very excited to be able to give clients who want to eliminate commission costs a choice of ETFs that are unrivaled in breadth and depth across Morningstar ETF Categories.”

Schwab’s study also found that roughly 70% of investors are looking for ETFs with no hidden fees. In addition, 46% say they would not buy a commission-free ETF if they knew they had to pay a fee for selling the ETF too early.