This week the U.S. Securities and Exchange Commission announced it's set up a new office focused specifically on "fintech" (including crypto-assets and blockchain tech), but that's not all the news you should know.

Catch up quick: Fidelity wants to help big cryptocurrency investors; amid growing Tether concerns, other stablecoins are having a great week; and most 2017 initial coin offerings (ICOs) are now trading below their listing price.

Fidelity wants to help big cryptocurrency investors (Axios)

Why it matters: Fidelity's new company will provide services to institutional investors, including custody, which has been one of the main hurdles to getting more institutional investors into cryptocurrencies. While some independent companies like BitGo and Kingdom Trust exist to help, several large financial institutions are developing their own.

Amid growing Tether concerns, other "stablecoins" are having a great week (Coindesk)

Why it matters: Tether, a digital token said to be backed by U.S. dollars, is seeing its price continue to drop below $1 as investors have been increasingly weary of the issuer's claims and are rushing to exchange the tokens for real dollars. Meanwhile, a number of digital token exchanges are adding or considering adding more stablecoins, reinforcing the growing market demand for this category of asset.

Report: Most 2017 initial coin offerings (ICOs) now trading below listing price (Reuters)