The proof-of-stake is a method of securing a cryptocurrency network and achieving distributed consensus through requesting users to show ownership of a certain amount of currency. It is different from proof-of-work systems that run difficult hashing algorithms to validate electronic transactions. The scheme is largely dependent on the coin, and there's currently no standard form of it. Some cryptocurrencies use a combined proof-of-work/proof-of-stake scheme.
Money market funds offer high liquidity compared to other instruments with similar expected returns, like CD’s and treasury bills, while still being relatively low risk. You must typically hold a CD until its full maturity date to avoid paying an early withdrawal penalty. Treasury bills also have specific maturity dates. Money market funds, however, don’t have a set shelf life and can be liquidated on-demand when the cash is needed.
An MMA is not a checking account. Some money market accounts have check-writing and debit card features. But, as with regular savings accounts, they are limited by the Federal Reserve to six “convenient” transfers or withdrawals a month — including by check, debit card swipe or online transfer. If you want the ability to write checks and make frequent withdrawals, you may be better off opening an interest-bearing checking account. (You can look for high-interest accounts by entering your ZIP code and minimum deposit in our interest checking tool.)
We want to hear from you and encourage a lively discussion among our users. Please help us keep our site clean and safe by following our posting guidelines, and avoid disclosing personal or sensitive information such as bank account or phone numbers. Any comments posted under NerdWallet's official account are not reviewed or endorsed by representatives of financial institutions affiliated with the reviewed products, unless explicitly stated otherwise.
Looking closer we see that if you can meet the $3,000 minimum investment size, Vanguard’s VMMXX offers an appealing combination of relatively high returns with low expenses. If you don’t have a large amount of cash to invest, you should note that both FMPXX and FIDXX have $1MM investment minimums. If you have less than $1,000, SPRXX doesn’t meet the yield and expense ratio thresholds we laid out, but it doesn’t have an investment minimum.