NEW YORK ( TheStreet) -- Thursday's big news was that Twitter filed a confidential S-1 form with the SEC, which is the first regulatory step in the process for an initial public offering or IPO. The significance of the word confidential is that, under the JOBS act, companies with revenue less than $1 billion do not need to disclose their numbers in this first step of the process.Although the actual listing probably won't happen until early next year, there is already plenty of speculation about what the value of the company might be when it actually starts trading. On many accounts, the company had a private market value of $10 billion earlier this year, leading some to conclude that the pricing of the IPO in a few months could be around $14 billion. Regardless of its initial value the stock could go higher right away, along the lines of other social media companies like LinkedIn ( LNKD), whose IPO was priced at $45 and closed its first day of trading at $94.25. SOCL) added Facebook ( FB) after 10 days of trading. At the time, CEO Bruno del Ama was quoted as saying that waiting 10 days before adding it to the fund could avoid some of the initial volatility. Regardless of whether there is more volatility in the first few days for Twitter stock, based on current numbers under the hood of SOCL, Twitter would be the fifth-largest holding with perhaps a high single-digit weighting in the fund. Of course, Facebook is by far the largest company in the space, but the weighting is capped and currently is 12% of the fund, which is the same weighting as Tencent Holding ( TCEHY) and Sina ( SINA), which are both Chinese companies. Twitter's potential weighting in SOCL would be enough to move the needle right away. FDN). Based on FDN's current constituency, Twitter could be a top-10 holding, with approximately a 3%-4% weighting. FDN's largest holdings are Google ( GOOG), Amazon ( AMZN), eBay ( EBAY) and Facebook. Stocks are eligible for inclusion once they have three months of trading history.