The problem of liquidity fragmentation in the tokenization of the US stock market has finally begun to be solved. We saw OKX announce the launch of 24 tokenized US stocks and ETFs, the world's first "unified tokenized stock market" that can trade 24/7 and merge multiple issuers' assets into one order book. What are the pain points of tokenizing US stocks? What problems does OKX's unified mechanism solve? In the ordinary sense, tokenizing US stocks refers to converting the price performance of real stocks or ETFs into tokens on the blockchain. Behind it is a 1:1 real stock custody, and what you are buying is not Apple's stock, but an on chain certificate representing the trend of Apple's stock price. Trading is conducted on encrypted platforms and settled with stablecoins, which theoretically can be uninterrupted for 24 hours. This is not OKX's first creation. Similar products have already been launched on Kraken and Bybit through Backed's xStocks before. Essentially, TradFi's liquidity is cut into small pieces and moved onto the chain or CEX, allowing crypto users to participate in the US stock market without opening a US stock account. But the problem with this model is also serious: the liquidity is too fragmented. Different platforms and issuers issue the same target (such as AAPL), each with their own order book. The depth is shallow, the price difference is large, and the company's actions (dividends, stock splits) are also different. The user experience is like trading the same coin on different exchanges, with a strong sense of fragmentation. It seems that OKX's goal is to solve this fragmented problem as much as possible. What exactly does OKX's' unification 'unify? 1) They named their assets uniformly: preceded by a capital X, such as XAAPL, XTSLA, XSPY. Backed by xStocks endorsement, 1:1 real stock custody, and support for Solana and X Layer network access. 2) The more crucial innovation lies in the unification of the order book. If other issuers in the future also make tokenized versions of the same subject matter, OKX will merge them into one asset, one order book, and the same set of company action rules. Liquidity is no longer dispersed across multiple pools, but concentrated in one place. 3) In terms of trading, it is also native to crypto: 24/7, trading directly with stablecoins, supporting grid and DCA robots, automatic conversion of dividends into shares, which is particularly friendly to crypto users, In summary, OKX is not simply copying xStocks that others already have, but wants to create an aggregation layer: consolidating potentially dispersed tokenized supplies onto its own platform to form a deeper liquidity pool, while retaining the native trading tools and account experience of crypto. Previously, tokenization of US stocks was most criticized for its fragmented and thin liquidity. The biggest advantage of the OKX model is the concentration of liquidity. For the entire market, if a unified order book can really run, theoretically it can improve price discovery efficiency and reduce arbitrage space for the same subject on different platforms. In the long run, this is also a step for RWA to move from "fighting on its own" to "infrastructure aggregation". Of course, it should also be made clear that this is not a stock, without voting rights or shareholder identity, but only a price exposure. Whether it is worth it or not depends on one's own judgment. The OKX mechanism is essentially aimed at achieving a deeper integration between the trading experience of crypto and the assets of TradFi. It's not just about listing a few tokens, but an attempt to integrate them in the liquidity layer. If this direction works, it will serve as a demonstration for more RWAs to be put on the chain in the future.