Antonio Costa

52yo Private Trader | +25y experience in US Stocks. Always DYOR - Tweets are my personal opinion, not advice.

[Antonio Costa @ACInvestorBlog]

Dearest followers, I would like once again to remind everyone, that I don't have any TELEGRAM, Facebook, Threads or Instagram account. Scam artists are using my Twitter profile photo on a daily basis to create fake profiles and then trying to trick people into promoting its scam products. Please be aware of these schemes going around. I've been verified on Twitter for over 4 months. I don't send private Twitter messages promoting services nor ask you for money. Thank you very much to all of you that everyday report these scam artists bc they block me first to avoid being found. I really appreciate your help.

[Antonio Costa @ACInvestorBlog]

@pplware Esse título é um bocado enganador 😀 descida na gasolina , mas o gasóleo.. 📈

[Antonio Costa @ACInvestorBlog]

@MuseumCommodore I spent hours and hours playing that game on my Amiga500

[Antonio Costa @ACInvestorBlog]

$HTZ The rate increase is a meaningful risk factor and pressure point for shorts. It makes holding the position expensive and can accelerate covering if the stock starts rising. It is one of the classic ingredients in a squeeze setup, not the sole cause. Definitely on watch, this spike in the short borrow fee rate is not normal.

DYOR

[Antonio Costa @ACInvestorBlog]

$HTZ Short Borrow Fee Rates at highs 🤯 Rates this high are rare and signal that shares are extremely scarce to borrow.

[Antonio Costa @ACInvestorBlog]

$SPY $QQQ $IWM I continue to believe we are still HERE. Yesterdays sell-off lines up with extreme fear readings, and AI is widely expected to drive major economic transformation.

AI is broadly viewed as a transformative force that can reshape productivity, innovation, and industry structure more widely and potentially faster than prior waves like the internet.

A Bain & Co. analysis projects it could put ~$4.7 trillion in profits “at stake” across a large majority of sectors by the mid-2030s.

Near-term friction is real. Massive AI infrastructure/capex is underway. Extreme fear readings and a sharp tech pullback do not invalidate the multi-year AI thesis, they reflect the market’s sensitivity to near-term proof of returns amid high valuations and macro noise.

After this steep pullback and extreme fear reading, could this be a shake-out that sets up the next leg higher, or are we still early in a larger correction?

[Antonio Costa @ACInvestorBlog]

Biggest Short Squeezes by Estimated Short-Seller Losses:

$TSLA Tesla (2020): ~$39B on a ~730% rally.

Volkswagen (2008): ~$30B (classic corner of the float).

$GME GameStop (2021): ~$20B with ~140% short interest of the float.

$AMC AMC (2021): smaller related losses.
Figures are approximate estimates from data providers and historical reports.

The current market enviroment looks primed to create another EPIC short squeeze.

Which will be the next ?

Many shorts are extremely oversold and heavily shorted.

[Antonio Costa @ACInvestorBlog]

$HTZ did anyone notice this ? A 100-120% annualized borrow rate is extreme.

This is a daily history of the cost-to-borrow (CTB / hard-to-borrow fee) for Hertz Global Holdings (HTZ) stock,

The rates exploded from the mid-teens into triple digits in a couple of days. HTZ is currently one of the more extreme hard-to-borrow names.

HTZ also has very high short interest (roughly 36–39% of shares outstanding/float in the latest available data) and elevated days-to-cover (~10+). Combined with the sudden fee spike, this is a classic hard-to-borrow setup.

How much more pain can the shorts take?

[Antonio Costa @ACInvestorBlog]

@AshCrypto 🤣🤣 Is this a joke, rigth ?

[Antonio Costa @ACInvestorBlog]

$FNUC still dropping on very low volume just 200K shares per session on a penny name. This is retail selling not institutions. If they drop the MRE news the move could be explosive like in December 2024 imho RSI at 15 (unreal)

[Antonio Costa @ACInvestorBlog]

$HTZ Gex

[Antonio Costa @ACInvestorBlog]

$HTZ Heating up

[Antonio Costa @ACInvestorBlog]

$NBIS Big bullish bet DTE148 $230 calls , $12M premium

[Antonio Costa @ACInvestorBlog]

Now that the Yields are falling, the money should flow into small caps $IWM Plus, traders are no longer fully price in a Fed hike before year-end.

[Antonio Costa @ACInvestorBlog]

$MNTS the company announced this morning that it has been awarded a task order by NASA for the formulation phase of the agency's Fly Foundational Robots (FFR) Resupply mission, a mission designed to advance the technologies needed for future in-space servicing, assembly, and manufacturing (ISAM).

Momentus Inc. reported a strong cash position in its latest quarterly filing. According to the company’s Form 10-Q for the period ended June 30, 2026 (filed August 11, 2026), cash and cash equivalents stood at $107.6 million

So, the stock is trading at 50% discount. Company is falling 7% on very low volume, just panic not rationality.

[Antonio Costa @ACInvestorBlog]

@Mr_Derivatives yeah 🤣

[Antonio Costa @ACInvestorBlog]

$SPX Gex

[Antonio Costa @ACInvestorBlog]

$WKEY $20 is a key resistance zone to watch in the coming days. At some point money will flow into the holding company imho $40M market cap valuation is ridiculous as a sum-of-parts of all companies including the cash.

From a theoretical mark-to-market value of the disclosed beneficial ownership of $SAIQ at $8 the WQEY stock should be trade at $50 (Markets continue to price WQEY at a large discount).

Even after holding-company discounts, liquidity discounts, and the Quantisimo contribution, a reasonable mark-to-market still points to a value above $30

Do the math. In a normal market, this would certainly be trading at $30

DYOR

[Antonio Costa @ACInvestorBlog]

Great news for small caps $IWM 👇