The S&P/ASX 200 Index (ASX: XJO) tumbled on Thursday, falling 1.05% to close at 7,138.2 points.
The market's suffering came amid continued concerns of the United States' rapidly approaching debt ceiling, as my Fool colleague Bernd reported this morning.
Such concerns also appeared to have a negative impact on Wall Street indices overnight. Dow Jones Industrial Average Index (DJX: .DJI) dumped 0.8% in Wednesday's session, while the S&P 500 Index (SP: .INX) dropped 0.7%, and the Nasdaq Composite Index (NASDAQ: .IXIC) fell 0.6%.
Back home, there was one bright spot on the bourse. The S&P/ASX 200 Information Technology Index (ASX: XIJ) surged 2.4%.
It followed ripper earnings from Nvidia Corporation (NASDAQ: NVDA) overnight. The stock is leaping 25% in after-hours trade.
Meanwhile, the ASX 200's two largest sectors, the S&P/ASX 200 Materials Index (ASX: XMJ) and the S&P/ASX 200 Financials Index (ASX: XFJ), plunged 1.8% and 1.9% respectively today.
So, with all that covered, let's take a look at the ASX 200 shares posting the biggest gains on Thursday.
Top 10 ASX 200 shares countdown
The biggest gain on the index today came from the Megaport Ltd (ASX: MP1) share price. It rose 12.8% despite no news having been released by the software provider.
These shares made today's biggest gains:
| ASX-listed company | Share price | Price change |
| Megaport Ltd (ASX: MP1) | $6.44 | 12.78% |
| Polynovo Ltd (ASX: PNV) | $1.54 | 7.69% |
| Costa Group Holdings Ltd (ASX: CGC) | $2.54 | 6.72% |
| Nextdc Ltd (ASX: NXT) | $12.19 | 4.37% |
| Altium Ltd (ASX: ALU) | $38.48 | 4.28% |
| Telix Pharmaceuticals Ltd (ASX: TLX) | $11.95 | 3.91% |
| TechnologyOne Ltd (ASX: TNE) | $16.30 | 2.52% |
| Block Inc (ASX: SQ2) | $94.91 | 2.48% |
| Xero Limited (ASX: XRO) | $111.28 | 2.33% |
| Boral Limited (ASX: BLD) | $3.99 | 2.31% |
Our top 10 shares countdown is a recurring end-of-day summary to let you know which companies were making big moves on the day. Check in at Fool.com.au after the weekday market closes to see which stocks make the countdown.
