you have minimal liquidity risk and can always buy more short-term Treasury bills at their latest rates. You don't have to think too much about anything else. The downside is lower yields.
Before making a final decision, it may be useful to read analyst opinions, or reference the ratings provided by stock broker firms such as Schwab and others. Also, look at the "short interest" for a stock; this provides a measure of how many investors have a negative opinion about the co...