NEW YORK (TheStreet) -- TheStreet's Jim Cramer answers Twitter  (TWTR - Get Report)  questions from the floor of the New York Stock Exchange on Monday, and this week's first query is if it's common for small individual investors to be left out of large IPOs like Alibaba's  (BABA - Get Report) .

Cramer says Alibaba was unlike anything he had seen in a long time as the company got directly involved with the IPO, which is typically not the case. But Alibaba placed its stock with large mutual funds, which led to very few hedge funds and retailers getting involved. Cramer says this is one of the reasons the stock was bid up so aggressively.

He justified buying Alibaba stock in the $80 range last week and reiterates on Monday that it is still a buy in the mid-$80 range.

Must Watch: Cramer Answers Twitter Questions on Alibaba, Walgreen, Alcoa, EMC

Barclays  (BCS) downgraded Walgreen  (WAG) on Monday, and one investor asks Cramer if he should sell or hold the stock. Cramer says people are fed up with companies that have either done nothing or gone down, and his forecast for those who entered Walgreen stock is "pain" because he thinks the stock will continue to decline. He says the stock is a better sell than a buy right now.

Another user asks if he should sell his Alcoa  (AA - Get Report) position now or wait for earnings. Cramer says the problem with owning Alcoa is that they had a "monster run" and just priced a deal to get more into aerospace, but a stock that has doubled over the course of a year is typically not a great buy. He adds Alcoa has stabilized.

Next, a user asks if all the uncertainty around EMC  (EMC) makes it a sell. Cramer says no because EMC has activist investors. He contrasts it to Walgreen, which is "dirt cheap" and should be bought, yet continues to decline. EMC is expensive, but people want growth. EMC's growth is not what it used to be, but growth in VMware (VMW - Get Report) , which EMC owns, is gigantic, so Cramer says to stick with EMC.

Finally, a user asks for Cramer's thoughts on World Wrestling Entertainment  (WWE - Get Report) . Cramer thinks this stock has been a sell ever since the debut of the WWE Network earlier this year, which changed the traditional pay-per-view model of the company. He says people are intrigued and think the stock has to be cheap, but he does not want to be there. The stock has had a run, but Cramer advises investors to take profits.

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