Nasdaq-100 Weighting More Than Doubles In Rebalance

SPCX closed at $151.8695 on September 21, 2026, down 0.55% from the prior session's $152.71 after a session that ran as high as $158.13 before fading into the close.

Executive Summary

SPCX opened at $154.72 and pushed to an intraday high of $158.13 before giving back the entire advance and more, closing at $151.8695, down 0.55% on the day. The session took place against a backdrop of index-driven flows: reporting indicates SpaceX's Nasdaq-100 weighting more than doubled in the latest rebalance, to 2.82%, a change tied to potential passive buying across QQQ and related ETFs. Coverage also flagged the company's upcoming 14th Starship test, targeted for September 28, aimed at completing a full orbit and deploying Starlink V3 satellites, alongside continued attention to the AI-infrastructure buildout and data-center siting questions around SpaceX's operations.

Volume came in at 73.64 million shares, below the average of 88.49 million shares traded per day since the June IPO, and well under the prior session's 335.63 million shares. The pullback from the day's high left the stock still up sharply from its June IPO offer price of $135, even as it remains below both its June 12 IPO-day close of $160.95 and its post-IPO peak.

News

1. Stocks Jump On Iran, China, and Bitcoin Hopium—But The Big Conflicts Have Not Gone Away

Buying On Hopium

Please click here for an enlarged chart of Direxion Daily Semiconductor Bull 3X ETF (NYSE:SOXL).

Note the following:

Semiconductors reflect the AI trade, and SOXL is the momo crowd’s (Benzinga, Sep 21, 2:42 PM ET)

2. What's Going On With SpaceX Stock Today?

Space Exploration Technologies shares are remaining stable Monday. Its Nasdaq-100 weighting more than doubled in the index rebalance. (Benzinga, Sep 21, 2:34 PM ET)

3. Is SpaceX Stock Worth Buying Ahead of Its 14th Starship Test?

SpaceX targets September 28 for Starship Flight 14, aiming to complete a full Earth orbit and deploy Starlink V3 satellites. The company operates three major business segments: Starlink (established satellite broadband), Starship (development-stage reusable rocket), and AI infrastructure (with 247% YoY revenue growth). However, heavy capital expenditures ($18.4B in Q2 2026), net losses despite positive EBITDA, and high valuation present significant risks. Analysts recommend holding for existing shareholders but caution against new purchases. (Zacks Investment Research, Sep 21, 11:16 AM ET)

4. SpaceX’s Nasdaq-100 Weight Just More Than Doubled. Here’s Where ETF Money Is Heading

SpaceX’s Nasdaq-100 weighting jumps to 2.82%, triggering billions in potential passive buying. Here’s what the rebalance means for QQQ, QQQM and other ETFs. (Benzinga, Sep 21, 10:55 AM ET)

5. SpaceX Finds Way Around Data Center Moratorium As 300-Plus Restrictions Delay 3 Projects

SpaceX sidestepped Brownsville restrictions as SemiAnalysis says 300+ data-center rules have delayed just three U.S. projects. (Benzinga, Sep 21, 10:22 AM ET)

6. AI Investment Boom Is 'Massive' — Top Economist Says US Spending Is Moving Away From Homes and Toward Data Centers

Fed economist Adam Shapiro flags a pivotal U.S. investment shift as computer spending overtakes residential investment amid AI expansion. (Benzinga, Sep 21, 6:17 AM ET)

7. Austin to San Antonio in Under 30 Minutes? Elon Musk Says Boring Company Is Working on 200+ MPH Tunnel to Beat Traffic

Elon Musk says The Boring Company plans a 200+ mph Austin–San Antonio tunnel, which could significantly reduce travel time. (Benzinga, Sep 21, 4:38 AM ET)

Price Action

Metric	Value
Open	$154.72
High	$158.13
Low	$151.60
Close	$151.8695
Change vs prior close	-$0.8405 (-0.55%)
Volume	73,635,398
Intraday range	$6.53
Close vs IPO offer price ($135.00)	+$16.8695 (+12.50%)

SPCX opened at $154.72, above the prior close of $152.71, and extended to $158.13 in early trading before sellers took control. The stock gave back the gain and traded down through the prior close, the open, and eventually its own intraday low before settling at $151.8695, just $0.27 above the day's $151.60 low. Volume of 73.64 million shares was below the 88.49 million-share average recorded since the June IPO and far below the prior session's unusually heavy 335.63 million shares. Relative to the $135.00 IPO offer price, SPCX remains up 12.50%; relative to the $160.95 first-day close, it is down 5.64%.

Bold takeaway: SPCX opened higher, rallied toward $158, and reversed to close near the day's low, a session that gave back an early advance rather than building on it.

Technicals

SPCX has roughly three months of trading history since its June 12, 2026 IPO. That is enough for the shorter-window averages (SMA-5, SMA-10, SMA-20, SMA-50, EMA-5) and a 14-day RSI to compute, but SMA-200 is not yet available and all of these readings should be treated as still maturing given the stock's limited history and the wide swings already on record (a post-IPO close as high as $201.80 and as low as $108.27).

Trend

Since the June 12 IPO close of $160.95, SPCX spiked to a closing high of $201.80 on June 16, then fell steadily through July to a closing low of $108.27 on August 5. From that low, the stock recovered through August and into September, closing at $154.81 on September 17 and $152.71 on September 18 before today's $151.8695. The stock currently trades above its SMA-20 ($146.08) and SMA-50 ($134.76), consistent with the medium-term recovery off the August low, even as today's session broke the short, choppy uptrend of the last several sessions.

Candle read

Today's candle has a body of -$2.85 (open $154.72, close $151.8695), an upper wick of $3.41, and a lower wick of just $0.27, on a total range of $6.53. The close location of 0.04 means the close sits just 4% up from the day's low — essentially at the bottom of the day's range. That combination — a long upper wick, a small lower wick, and a close pinned near the low — reads as a rejection at the day's highs: buyers pushed the stock to $158.13 and could not hold it, and sellers were in control into the close.

Support levels

• $151.60 — today's intraday low
• $150.75 — SMA-5
• $151.43 — EMA-5
• $150.23 — SMA-10
• $146.08 — SMA-20
• $135.00 — IPO offer price
• $134.76 — SMA-50

Resistance levels

• $152.71 — prior session's close
• $154.72 — today's open
• $154.81 — September 17 close
• $158.13 — today's intraday high
• $160.95 — IPO-day close (June 12)

Momentum interpretation

Bull scenario: a move back above the $152.71–$154.81 zone (prior close and the September 17 close) that holds and pushes toward today's $158.13 high would suggest today's reversal was a one-session pullback rather than a change in the recovery trend that has held since the August low.

Bear scenario: a break below the $151.60 intraday low, followed by a slide through the $150.23–$150.75 SMA-5/SMA-10 cluster, would open the way toward the SMA-20 near $146.08, a level that has acted as support since late August.

Neutral scenario: SPCX consolidates between the SMA-5/EMA-5 cluster (roughly $150.75–$151.43) and the prior close at $152.71, digesting today's reversal without resolving in either direction, with the RSI-14 reading of 57 consistent with a market that is neither overbought nor oversold.

Trading Takeaway

SPCX's session was defined by a failed breakout: an early push to $158.13 that fully unwound into a close near the day's low, on volume that was lighter than both the recent average and the prior session's elevated turnover. The broader picture is still constructive — the stock remains well above its SMA-20 and SMA-50 and up 12.50% from its IPO offer price — but today's candle shape (long upper wick, close near the low) is a near-term caution flag. The next session's key levels to watch: a reclaim of $152.71–$154.81 would favor continuation of the recovery trend toward $158.13, while a break of $151.60 would put the $150.23–$150.75 support cluster, and then the SMA-20 at $146.08, in play.

Sources

1. Stocks Jump On Iran, China, and Bitcoin Hopium—But The Big Conflicts Have Not Gone Away — Benzinga
2. What's Going On With SpaceX Stock Today? — Benzinga
3. Is SpaceX Stock Worth Buying Ahead of Its 14th Starship Test? — Zacks Investment Research
4. SpaceX's Nasdaq-100 Weight Just More Than Doubled. Here's Where ETF Money Is Heading — Benzinga
5. SpaceX Finds Way Around Data Center Moratorium As 300-Plus Restrictions Delay 3 Projects — Benzinga
6. AI Investment Boom Is 'Massive' — Top Economist Says US Spending Is Moving Away From Homes and Toward Data Centers — Benzinga
7. Austin to San Antonio in Under 30 Minutes? Elon Musk Says Boring Company Is Working on 200+ MPH Tunnel to Beat Traffic — Benzinga
8. Alpaca Markets (SIP) — market data

Disclaimer

This report is for informational purposes only and does not constitute investment advice, a recommendation, or a solicitation to buy or sell any security. SPCX is a newly listed stock with a limited trading history, and technical readings referenced here should be weighed accordingly. Verify all data independently before making any financial decision.