The Global X Social Media Index ETF (NasdaqGS: SOCL) is still up almost 50% year-to-date, but October has not been particularly kind to the high-flying fund.

Since the start of the month, SOCL is off about 3.7% and as valuation concerns regarding the ETF’s holdings accelerated, so have SOCL’s October woes. Since October 18, the fund is off nearly 7%. [Talking About the Social Media ETF]

Never fear because it appears Mark Zuckerberg’s Facebook (NasdaqGM: FB) has come to SOCL’s rescue. After the close of U.S. markets Wednesday, shares of Facebook surged (up 8% at this writing) after the company reported net income of $621 million on $2 billion in revenue for the third quarter. Analysts expected a profit of $462.3 million on $1.9 billion in revenue. Importantly, Facebook said that nearly half its third-quarter advertising revenue came from mobile.

To make a long-story short for how this pertains to SOCL, the ETF traded higher by as much as 3.15% during Wednesday’s after-hours session and is up 2.53% at this writing. Even when splitting the difference and calling that 2.8%, that is still an unusually large after-hours move for an ETF and one that could not come at a better time for SOCL. [Ten Small Sector ETFs With Big Returns]

The ETF was dragged lower Wednesday after investors reacted poorly to quarterly reports from LinkedIn (NYSE: LNKD) and Yelp (NasdaqGM: YELP). LinkedIn was SOCL’s fourth-largest holding as of Tuesday. That stock and Yelp combine for 11.5% of SOCL’s weight, according to issuer data.